Definition for Heart and soul:

• the choicest or most essential or most vital part of some idea or experience; " the gist of the prosecutor's argument"; " the heart and soul of the Republican Party"; " the nub of the story"

Synonyms for Heart and soul:

• adj.

  •devout (adjective)
  • deep.

• adv

  •completely (adverb)
  • nth degree,
  • the limit,
  • intensively,
  • the max,
  • the end.
  •entirely (adverb)
  • devotedly.

• adv.

  •body and soul (adverb)
  • completely.
  •completely (adverb)
  • exclusively,
  • altogether,
  • solidly,
  • unconditionally,
  • unanimously,
  • exhaustively,
  • competently,
  • without omission,
  • Undividedly,
  • utterly,
  • in full,
  • ultimately,
  • totally,
  • on all counts,
  • quite,
  • finally,
  • unabridged,
  • In Toto,
  • all the way,
  • extensively,
  • from beginning to end,
  • to the limit,
  • to the end,
  • painstakingly,
  • to the nth degree,
  • comprehensively,
  • from A to Z,
  • effectively,
  • in all,
  • to nth degree,
  • hook line and sinker,
  • thoroughly,
  • en masse,
  • to the max,
  • absolutely,
  • perfectly,
  • in entirety,
  • conclusively.
  •fully (adverb)
  • outright,
  • royal,
  • entirely,
  • all out,
  • positively.
  •wholly (adverb)
  • well,
  • all,
  • roundly.

• n.

  •core (noun)
  • core.
  •essence (noun)
  • essence.
  •gist (noun)
  • gist.
  •heart (noun)
  • heart.
  •heart and soul (noun)
  • kernel,
  • pith,
  • meat,
  • nitty-gritty,
  • inwardness,
  • sum,
  • marrow,
  • nub,
  • substance,
  • center.

• Other synonyms:

  •
  • happily.

Antonyms for Heart and soul:

• adj.

  • devout
    dishonest, unbelieving, unexcited, disloyal, indifferent, apathetic, irreligious, frigid, unenthusiastic, cool, dispassionate, insincere, cold.

• adv.

  • completely
    incompletely, partially, partly, inadequately.
  • fully
    insufficiently.
  • wholly
    Inclusively.