Synonyms for By fits and starts:

• adj.

  •piecemeal (adjective)
  • fragmentary,
  • step by step,
  • interrupted,
  • intermittent,
  • little by little,
  • by degrees,
  • partially,
  • gradually,
  • gradual,
  • patchy,
  • spotty,
  • partial.

• adv.

  •all (adverb)
  • by fits and starts.
  •irregularly (adverb)
  • anyhow,
  • periodically,
  • spasmodically,
  • Eccentrically,
  • in snatches,
  • infrequently,
  • sporadically,
  • now and again,
  • unpunctually,
  • uncommonly,
  • slapdash,
  • uncertainly,
  • helter-skelter,
  • out of sequence,
  • by turns,
  • jerkily,
  • at intervals,
  • disconnectedly,
  • willy-nilly,
  • unmethodically,
  • haphazardly,
  • unevenly,
  • occasionally,
  • off and on,
  • any which way.

• n.

  •by fits and starts (noun)
  • with many interruptions.

• Other synonyms:

  •
  • partly.
  •inarticulately
  • incoherently.
  •Other relevant words:
  • Skippingly,
  • in spots,
  • per saltum,
  • by fits,
  • by snatches,
  • by jerks,
  • by catches,
  • by skips.

Antonyms for By fits and starts:

• adv.

  • irregularly
    evenly, regularly.