Synonyms for Onerous:

• adj.

  •arduous (adjective)
  • strenuous,
  • painful,
  • up hill,
  • most murder,
  • up-hill,
  • more murder,
  • severe.
  •burdensome (adjective)
  • super-incumbent,
  • super incumbent,
  • more carking,
  • most crushing,
  • most carking,
  • most superincumbent,
  • more crushing,
  • more superincumbent.
  •demanding (adjective)
  • more backbreaker,
  • importunate,
  • most backbreaker.
  •difficult (adjective)
  • contrary,
  • cumbersome,
  • uphill,
  • tight,
  • bothersome,
  • easier said than done,
  • complex,
  • complicated,
  • rough,
  • cantankerous,
  • not easy,
  • Difficile,
  • finicky,
  • upstream,
  • hard-won,
  • up-stream,
  • wearisome,
  • knotty,
  • ticklish,
  • wearing,
  • grinding,
  • thorny,
  • wearying,
  • rugged,
  • tricky,
  • immense,
  • troublesome,
  • galling,
  • Operose,
  • adverse,
  • fussy,
  • harsh.
  •difficult; requiring hard labor (adjective)
  • grueling,
  • distressing,
  • vexatious,
  • austere,
  • Irksome,
  • embittering,
  • overtaxing,
  • pressing,
  • crushing,
  • ponderous,
  • excessive,
  • exhausting,
  • grave,
  • intolerable,
  • overpowering,
  • Fatiguing,
  • plodding,
  • responsible,
  • tiring,
  • merciless,
  • serious,
  • headache.
  •disturbing (adjective)
  • dis-comforting,
  • most harassing,
  • most agitating,
  • more discomforting,
  • more discommoding,
  • dis composing,
  • more foreboding,
  • most discomposing,
  • dis agreeable,
  • most discommoding,
  • dis-agreeable,
  • fore boding,
  • dis-composing,
  • impeding,
  • dis concerting,
  • most foreboding,
  • more discomposing,
  • dis-concerting,
  • most discomforting,
  • more troubling,
  • un pleasant,
  • most disconcerting,
  • more disconcerting,
  • un-pleasant,
  • Harassing,
  • most impeding,
  • embarrassing,
  • more agitating,
  • most troubling,
  • troubling,
  • fore-boding,
  • dis comforting,
  • more impeding,
  • more harassing.
  •exacting (adjective)
  • ex-acting,
  • hyper-critical,
  • un sparing,
  • hyper critical,
  • un-sparing,
  • more nit-picking,
  • stern,
  • more nit picking,
  • most nit-picking,
  • by book,
  • most nit picking,
  • nit picking,
  • ex acting,
  • unsparing.
  •formidable (adjective)
  • staggering,
  • over powering,
  • more all-powerful,
  • more dismaying,
  • puissant,
  • most ballbuster,
  • more all powerful,
  • more allpowerful,
  • most allpowerful,
  • most all powerful,
  • more ballbuster,
  • most dismaying,
  • most all-powerful,
  • mightiest,
  • over-powering,
  • allpowerful,
  • dis-maying,
  • dis maying.
  •grievous (adjective)
  • in tolerable,
  • dis quieting,
  • most heart rending,
  • most wounding,
  • un bearable,
  • egregious,
  • more wounding,
  • un-bearable,
  • more afflicting,
  • most afflicting,
  • heart rending,
  • dis-quieting,
  • most heart-rending,
  • in-tolerable,
  • more heart rending,
  • more heart-rending.
  •hard (adjective)
  • Toilful,
  • harder,
  • uphill battle.
  •heavy (adjective)
  • Acroamatic,
  • leaden,
  • Heightened.
  •heightened (adjective)
  • in tenser,
  • in-tense,
  • in-tensest,
  • in tense,
  • ter,
  • in-tensive,
  • in-tenser,
  • in tensive,
  • te.
  •oppressive (adjective)
  • in human,
  • more confining,
  • un-just,
  • most depressive,
  • in-human,
  • most confining,
  • most ironhanded,
  • more depressive,
  • de pressing,
  • more disheartening,
  • more ironhanded,
  • most disheartening,
  • heavy handed,
  • dis-heartening,
  • de-pressing,
  • heavyhanded,
  • un just,
  • over bearing,
  • un justest,
  • more headache,
  • dis heartening,
  • most headache,
  • un-justest,
  • un juster,
  • Over-bearing,
  • un-juster.
  •ponderous (adjective)
  • un handy,
  • un handier,
  • unhandier,
  • un-handy,
  • unhandiest,
  • un-handier,
  • un handiest.
  •rigorous (adjective)
  • un-compromising,
  • un permissive,
  • de-finite,
  • most unpermissive,
  • un-permissive,
  • un compromising,
  • in-flexible,
  • in temperate,
  • unpermissive,
  • in clement,
  • in-clement,
  • de finite,
  • more unpermissive,
  • in flexible,
  • in-temperate.
  •taxing (adjective)
  • more sapping,
  • Sapping,
  • most sapping,
  • most enervating,
  • most stressful,
  • more stressful,
  • more enervating.
  •tough (adjective)
  • in-tractable,
  • no piece cake,
  • no piece of cake,
  • in tractable.
  •trying (adjective)
  • more exasperating,
  • pro vocative,
  • most aggravating,
  • more vexing,
  • most exasperating,
  • most vexing,
  • pro-vocative,
  • ex-asperating,
  • ex asperating,
  • more aggravating.
  •unsettling (adjective)
  • un settling,
  • un-settling.
  •upsetting (adjective)
  • up setting,
  • up-setting.

• n.

  •
  • critical,
  • testing,
  • delicate,
  • intractable,
  • awkward,
  • impossible.
  •oppressive (noun)
  • causing care.

• Other synonyms:

  •
  • backbreaking,
  • effortful.
  •Other relevant words:
  • dense,
  • massive,
  • unruly,
  • nasty,
  • unbearable,
  • herculean,
  • spartan,
  • grim,
  • Disrupting,
  • rigourous,
  • hard-earned,
  • dark,
  • work,
  • enervating,
  • disastrous,
  • fierce,
  • gruelling,
  • bitter,
  • draining,
  • calamitous,
  • agonizing,
  • dispiriting,
  • donkeywork,
  • pulverization,
  • excruciating,
  • lumpish,
  • hard-fought,
  • killing,
  • strained,
  • Impedimental,
  • persnickety,
  • harrowing,
  • malevolent,
  • cruel,
  • indomitable,
  • deep,
  • overwhelming,
  • Besetting,
  • troubled,
  • inexpedient,
  • inhuman,
  • inopportune,
  • unsupportable,
  • repressive,
  • ruinous,
  • Encumbering,
  • unfavourable,
  • arduously,
  • tyrannical,
  • labor,
  • inconvenient,
  • punishing,
  • miserable,
  • irritating,
  • depressing,
  • distressful,
  • insupportable,
  • disheartening,
  • tedious,
  • plaguey,
  • tyrannous,
  • powerful,
  • Straitening,
  • hefty,
  • DEADWEIGHT CARGO,
  • laboured,
  • mighty,
  • racking,
  • stodgy,
  • back-breaking,
  • Hampering,
  • Draconic,
  • aggrieved,
  • Impeditive,
  • crippling,
  • worrisome,
  • nerd,
  • cumbrous,
  • unfavorable,
  • tragical,
  • draconian,
  • unendurable,
  • wonk,
  • toilsomely,
  • annoying,
  • sore,
  • labored,
  • incumbent,
  • hardly,
  • obtrusive,
  • afflictive,
  • worrying,
  • drudgery,
  • withering,
  • forced,
  • disadvantageous,
  • awful,
  • inappropriate,
  • challenging,
  • discouraging,
  • bad,
  • wretched,
  • toil,
  • untimely,
  • laboriously,
  • heartbreaking,
  • Overburdensome,
  • brutal,
  • stiff,
  • burdensomely,
  • onerously,
  • stringent,
  • hardhanded,
  • sweat,
  • ill timed,
  • Desolating,
  • malign,
  • dolorous,
  • Difficultly,
  • heavy-handed,
  • mill,
  • punitive.

Paraphrases for Onerous:

• Equivalence

  • Adjective
    burdensome.

• Independent

  • Adjective
    stringent, strenuous, challenging, rigorous, restrictive, complicated, demanding, harsh, oppressive, exhausting, formidable, tortuous, inconvenient, awkward, pricey, painstaking, draconian, stressful, momentous, problematic, hard, high-cost, tricky, strict, rigourous, complex, overwhelming, catastrophic, ambitious, binding, indebted, uphill, frustrating, herculean, unpleasant, unattractive, thorny, embarrassing, grave, dire, huge, far-reaching, inexpensive, constraining, significant, troubled, cost-effective, disagreeable, exorbitant, intractable.

• Other Related

  • Adjective
    cumbersome, arduous, difficult, costly, expensive, laborious, tedious, ponderous, serious, troublesome, exacting, severe, heavy, weighty, enormous, tough, unwieldy, distressing, tiresome, daunting, cost-intensive, time-consuming, painful, tremendous, fraught, heavy-duty, excessive.

Antonyms for Onerous:

• adj.

  • difficult; requiring hard labor
    facile, common, simple, trivial, Relieving, calm, mild, easy-going, gentle, nice, effortless, easy, temperate, friendly, helpful, light.
  • Other antonyms:
    endurable, bearable, snug, agreeable, trifling, unchallenging, undemanding, relaxing, balmy, pleasant, clement, comfortable, cozy, hospitable, moderate, tolerable, peaceful, reposeful, slight, luxurious, restful, genial.