hardness Get Printable Handwriting (hard-ness) 2 syllables Rhymes Learn It! Spelling Test Definition noun. 1 the property of being rigid and resistant to pressure; 2 the quality of being difficult to do Example Sentence The marble table top had a hardness we had never seen. Synonyms rigidness; toughness; difficultness; challenge Antonyms softness; easiness Rhymes Two Syllable Rhymes (1) hardness Share with your friends: