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.
  •intensively (adverb)
  • up and down,
  • inside out.
  •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.
  •Other relevant words:
  • relentlessly,
  • decidedly,
  • inflexibly,
  • breathlessly,
  • Operosely,
  • determinedly,
  • exuberantly,
  • with constancy,
  • intensely,
  • lock,
  • steadily,
  • obstinately,
  • purposefully,
  • precisely,
  • with all one's heart,
  • vigorously,
  • exactly,
  • heart in hand,
  • neck and crop,
  • earnestly,
  • effortfully,
  • with a will,
  • staunchly,
  • overall,
  • toilsomely,
  • throughout,
  • hook,
  • steadfastly,
  • impassionedly,
  • unyieldingly,
  • firmly,
  • persistently,
  • in earnest,
  • zealously,
  • fervidly,
  • in all respects,
  • sincerely,
  • wholeheartedly,
  • warmly,
  • at all points,
  • enthusiastically,
  • sinker,
  • head and shoulders,
  • heatedly,
  • excitedly,
  • hammer and tongs,
  • hard,
  • keenly,
  • industriously,
  • bec et ongles,
  • all over,
  • tenaciously,
  • passionately,
  • perseveringly,
  • arduously,
  • fixedly,
  • cordially,
  • root and branch,
  • strenuously,
  • kindly,
  • every bit,
  • in all seriousness,
  • in extenso,
  • resolutely,
  • you name it,
  • line,
  • glowingly,
  • heartily,
  • seriously,
  • ardently,
  • unswervingly,
  • to the hilt,
  • stock,
  • laboriously,
  • Resolvedly,
  • tooth and nail,
  • inside and out,
  • at full length,
  • in good earnest,
  • barrel,
  • manfully,
  • fervently,
  • decisively.

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.