136 synonyms for part such as all but, bit, bit, act, character, book, bit, be off, abandon, (up) to a point, and a little. Part is a noun, and its antonyms are whole and entirety.
Bit, chunk, division, fraction, fragment, hunk, lump, percentage, piece, portion, proportion, scrap, section, segment, share, slice, and wedge.
Bit, component, constituent, element, ingredient, module, and unit.
Act, chapter, component, division, episode, instalment, passage, scene, section, and volume.
Character, depiction, persona, portrayal, representation, role, and theatrical role.
Book, dialogue, ines, libretto, lyrics, score, script, speech, and words.
Bit, capacity, concern, contribution, function, hand, involvement, job, office, participation, position, post, province, responsibility, role, task, and work.
Be off, be on one's way, break up, depart, get going, go, go away, go one's (separate) ways, hit the road, leave, push off, say goodbye/farewell/adieu, say one's goodbyes, say/make one's farewells, scram, separate, set off, shove off, skedaddle, split, take one's leave, and take oneself off.
Abandon, cede, deliver up, discard, dispose of, forgo, give away, give up, hand over, let go of, relinquish, renounce, sacrifice, surrender, and yield.
(up) to a point, a little, all but, almost, barely, comparatively, fractionally, half, in part, in some measure, inadequately, incompletely, insufficiently, just about, moderately, nearly, not entirely, not fully, not nearly, not totally, not wholly, partially, partly, relatively, scarcely, slightly, somewhat, to a certain extent/degree, to a limited extent/degree, to some extent/degree, and very nearly.