bitterness Get Printable Handwriting (bit-ter-ness) 3 syllables Rhymes Learn It! Spelling Test Definition noun. 1 the property of having a harsh unpleasant taste; 2 a feeling of deep anger and illwill Example Sentence Her lips puckered at the bitterness of the lemon. OR She died of bitterness. Synonyms sourness; acidity; tartness; resentment; hostility Antonyms sweetness; love Rhymes Three Syllable Rhymes (1) bitterness Share with your friends: