Synonyms for Underweight:

• adj.

  •lank (adjective)
  • thin as a rail,
  • more fleshless,
  • all skin bones,
  • thin as rail,
  • Fleshless,
  • most fleshless,
  • all skin and bones.
  •scrawny (adjective)
  • more undernourished,
  • under weight,
  • most undernourished,
  • more skin-and-bones,
  • most skin and bones,
  • most skin-and-bones,
  • scraggier,
  • more skin and bones,
  • under-nourished,
  • under-weight,
  • under nourished.
  •skinny (adjective)
  • like rail,
  • more skin-and-bone,
  • more malnourished,
  • most skin and bone,
  • skin and bone,
  • most malnourished,
  • more skin and bone,
  • most skin-and-bone.

• n.

  •
  • anorexic,
  • be (all) skin and bone(s).
  •gaunt (noun)
  • undersized.
  •lean (noun)
  • lean.

• Other synonyms:

  •
  • gangling,
  • rangy,
  • gawky,
  • emaciated,
  • gangly,
  • gaunt,
  • lanky,
  • cadaverous,
  • skeletal,
  • slightly built,
  • pinched.
  •
  • puny,
  • spectral,
  • angular,
  • slight,
  • stringy.
  •Other relevant words:
  • light,
  • ponderosity,
  • meagerness,
  • lightweight,
  • spareness,
  • bantam,
  • slightness,
  • thinner,
  • heftiness,
  • elfin,
  • frailness,
  • fatness,
  • undeveloped,
  • Mignon,
  • Spindling,
  • half-starved,
  • skinniness,
  • weightiness,
  • shadow,
  • spindly,
  • shrunken,
  • beefiness,
  • little,
  • puniness,
  • slender,
  • heaviness,
  • weight,
  • underfed,
  • spidery,
  • Dwarfed,
  • anorectic,
  • petite,
  • stringbean,
  • featherlight,
  • runty,
  • scrubby,
  • scanty,
  • fine,
  • shrivelled,
  • avoirdupois,
  • feathery,
  • cheeseparing,
  • flat,
  • Boniness,
  • scrawniness,
  • withered,
  • net weight,
  • deadweight,
  • meagre,
  • runtish,
  • starved,
  • jaggy,
  • squat,
  • slim,
  • under-size,
  • gauntness,
  • poor,
  • stunted,
  • ponderousness,
  • tenuous,
  • net,
  • near,
  • small,
  • spare,
  • dwarfish,
  • Ponderability,
  • beef,
  • overbalance,
  • gross weight,
  • flimsy,
  • haggardness,
  • short,
  • heft,
  • peakedness,
  • leanness,
  • weightless,
  • meager,
  • sparse,
  • haggard,
  • tonnage,
  • thin person,
  • close,
  • tiny,
  • Lankness,
  • rawboned,
  • penny-pinching,
  • bantamweight,
  • rare,
  • skeleton,
  • flat-chested,
  • wispy,
  • underdeveloped,
  • poundage,
  • jagged,
  • gawkiness,
  • gravity,
  • lankiness,
  • poorness,
  • pygmy,
  • Raw-boned,
  • physical condition,
  • hollow-cheeked,
  • tightfitting,
  • wasted.

Paraphrases for Underweight:

• Forward Entailment

  • Adjective
    weight.
  • Noun, singular or mass
    weight.

• Independent

  • Adjective
    weighty.

Antonyms for Underweight:

• adj.

  • thin
    chubby, thick, fat, plump.
  • Other antonyms:
    extensive, big, king-size, leaden, cumbersome, hefty, whacking, goodly, heavy, overweight, largish, massive, super, huge, jumbo, voluminous, sizable, ponderous, oversize, weighty, hulking, handsome, considerable, bulky, great, substantial, unwieldy, large.

• Other antonyms:

  • n.
    full, inspissate, rich, thicken.