Synonyms for Have at it:

• v.

  •argue (verb)
  • cross swords,
  • battle,
  • hassle,
  • jump,
  • dispute,
  • sass,
  • bicker,
  • hammer,
  • lock horns,
  • rehash,
  • row,
  • bandy,
  • break with,
  • buck,
  • squabble,
  • hash,
  • contend,
  • quarrel,
  • gang up on,
  • hammer away,
  • disagree,
  • pettifog,
  • quibble,
  • cross.
  •debate (verb)
  • rebut,
  • demonstrate,
  • cogitate,
  • deliberate,
  • differ,
  • answer,
  • agitate,
  • controvert,
  • canvass,
  • reason,
  • confute,
  • disprove,
  • prove,
  • confab,
  • refute,
  • consider,
  • contest,
  • question,
  • oppose.
  •essay (verb)
  • undertake,
  • labor,
  • assay,
  • offer,
  • seek,
  • test,
  • struggle,
  • aim,
  • work,
  • travail,
  • strive,
  • take on,
  • venture,
  • toil,
  • endeavor.
  •pettifog (verb)
  • nitpick,
  • pick to pieces,
  • niggle.
  •quibble (verb)
  • hypercriticize,
  • carp,
  • evade,
  • blow hot and cold,
  • catch at straws,
  • spar,
  • waffle,
  • nit-pick,
  • flip-flop,
  • Paralogize,
  • argue over,
  • put up an argument,
  • shift,
  • cavil,
  • pretend,
  • make a big thing about,
  • prevaricate,
  • avoid,
  • hem and haw,
  • argufy,
  • criticize,
  • fence,
  • split hairs,
  • chicane,
  • equivocate.
  •wrangle (verb)
  • fall out,
  • brawl,
  • spat,
  • tangle,
  • tiff,
  • scrap.

• Other synonyms:

  •quibble
  • chicanes,
  • chicaning,
  • nit-picking,
  • flip-flopping,
  • flipflop,
  • chicaned.

Antonyms for Have at it:

• v.

  • argue
    agree, harmonize, ignore, overlook.
  • debate
    go along.
  • essay
    forget, neglect, pass, be idle.
  • quibble
    concur, approve.
  • wrangle
    give in.