Synonyms for By installments:

• adv.

  •gradually (adverb)
  • regularly,
  • little by little,
  • unhurriedly,
  • increasingly,
  • continuously,
  • successively,
  • gently,
  • piecemeal,
  • step by step,
  • progressively,
  • serially,
  • imperceptibly,
  • constantly,
  • by degrees,
  • bit by bit,
  • piece by piece,
  • sequentially,
  • moderately,
  • deliberately,
  • in small doses,
  • steadily,
  • inch by inch,
  • perceptibly.
  •partially (adverb)
  • somewhat,
  • partly.

• adv

  •incompletely (adverb)
  • partially.

• Other synonyms:

  •adv
  • gradually,
  • halfway,
  • Fractionally,
  • half-way,
  • in part,
  • in some measure,
  • to a certain extent,
  • not wholly,
  • to a certain degree.
  •Other relevant words:
  • advisedly,
  • always,
  • by choice,
  • by design,
  • by inches,
  • by small degrees,
  • ceaselessly,
  • center,
  • consecutive,
  • designedly,
  • endlessly,
  • fairly,
  • forever,
  • in small stages,
  • in stages,
  • in turn,
  • incessantly,
  • intentionally,
  • invariably,
  • jolly,
  • lightly,
  • measuredly,
  • middle,
  • middling,
  • midway,
  • mildly,
  • more and more,
  • more or less,
  • noticeably,
  • observably,
  • on a regular basis,
  • on purpose,
  • part,
  • passably,
  • perpetually,
  • pretty,
  • purposely,
  • reasonably,
  • slightly,
  • softly,
  • steady,
  • stepwise,
  • unceasingly,
  • unendingly,
  • unnoticeably,
  • bit-by-bit,
  • step-by-step.

Antonyms for By installments:

• adv.

  • gradually
    intermittently, suddenly, Fastly, abruptly.
  • partially
    totally, wholly, completely.