loneliness Get Printable Handwriting (lone-li-ness) 3 syllables Rhymes Learn It! Spelling Test Definition noun. 1 the state of not being in the company of others; 2 sadness resulting from being forsaken or abandoned Example Sentence Buddy does not like the feeling of loneliness. Synonyms isolation; sadness; solitude Antonyms accompanied; crowded Rhymes Three Syllable Rhymes (1) loneliness Share with your friends: