Synonyms for Abstinent:

adj.

•abstemious (adjective)
frugal, self-denying, sober, austere, moderate, temperate, ascetic, restrained.
•ascetic (adjective)
abstemious, severe, stark, stoic, franciscan, miserly, austere, parsimonious, repentant, celibate, lenten, trappist, penitential, spartan, monastic, dry, teetotaling, hermit-like, ascetic.
•celibate (adjective)
maiden, ascetic, asexual, intact, old maid, bachelor, single, unplowed, lone, virginal, monkish, alone, unwed, celibate, solitary, chaste, unmarried, abstemious, monastic, spinsterish, pure.
•continent (adjective)
abstentious, celibate.
•moderate (adjective)
conservative.
•on the wagon (adjective)
dry.
•sober (adjective)
teetotaling, temperate, sober, dry, restrained, moderate.
•temperate (adjective)
conservative, austere, restrained, prudent, self-denying, Sober-minded, moderate, temperate, sober, self-depriving, Abnegating, ascetic, frugal.

n.

•abstainer (noun)
nondrinker.
•abstinent (noun)
abstemious, abstainer, nondrinker, abstentious.
•person (noun)
abstainer, nondrinker.
•teetotaler (noun)
abstainer.

Other synonyms:

•nondrinker
nondrinker.
•Other relevant words:
abstentious, nondrinker, abstainer.