Synonyms of repentant

2 Syllables
sorrier, rueful, sorry, sorriest, subdued
3 Syllables
regretful, guilt-ridden, contrite, compunctious, penitent, atoning, ashamed
4 Syllables
attritional, penitential, self-reproachful, self-accusing, remorseful
5 Syllables
conscience-stricken, apologetic
6 Syllables
self-condemnatory