Synonyms of compunctious

2 Syllables
sorrier, sorriest, sorry
3 Syllables
regretful, guilt-ridden, contrite, penitent, ashamed, repentant
4 Syllables
self-accusing, attritional, penitential, self-reproachful, remorseful
5 Syllables
apologetic
6 Syllables
self-condemnatory