Synonyms for As a rule:

• adv

  •for the most part (adverb)
  • usually.
  •mostly (adverb)
  • most often.

• adv.

  •commonly (adverb)
  • generally,
  • regularly,
  • ordinarily,
  • frequently.
  •frequently (adverb)
  • usually,
  • customarily,
  • habitually.
  •generally (adverb)
  • by and large,
  • altogether,
  • normally,
  • all in all,
  • conventionally,
  • roughly,
  • predominantly,
  • mostly,
  • primarily,
  • broadly,
  • principally,
  • typically,
  • overall,
  • commonly,
  • largely,
  • chiefly,
  • on average,
  • almost always,
  • on the whole.
  •habitually (adverb)
  • habitually,
  • naturally.
  •largely (adverb)
  • largely,
  • mainly.
  •mostly (adverb)
  • above all,
  • most often.
  •ordinarily (adverb)
  • in general.
  •usually (adverb)
  • routinely,
  • as usual,
  • in the main.

• Other synonyms:

  •usually
  • commonly,
  • typically,
  • mostly,
  • normally,
  • usually,
  • customarily,
  • generally.
  •Other relevant words:
  • commonly,
  • primarily,
  • especially,
  • ordinarily,
  • frequently,
  • broadly speaking,
  • typically,
  • regularly,
  • usually,
  • normally,
  • habitually,
  • in particular,
  • as a matter of course,
  • inveterately,
  • pre-eminently,
  • in general,
  • as usual,
  • on the whole,
  • Prescriptively,
  • mainly,
  • broadly,
  • mostly,
  • whole,
  • altogether,
  • as a whole,
  • customarily,
  • almost always,
  • generally speaking,
  • conventionally,
  • routinely,
  • generally,
  • Prevailingly,
  • all things considered,
  • normatively,
  • above all,
  • chiefly,
  • most often,
  • to be expected,
  • by and large,
  • principally,
  • all in all,
  • on balance,
  • naturally,
  • predominantly,
  • as things go,
  • rule,
  • on average,
  • largely,
  • most of all,
  • roughly,
  • overall,
  • in the main,
  • average.

Antonyms for As a rule:

• adv.

  • commonly
    infrequently, rarely, unusually, seldom, uncommonly.
  • frequently
    not much.
  • generally
    particularly, specifically, sometimes, exactly.
  • normally
    abnormally, never.
  • usually
    exceptionally.