fungus Get Printable Handwriting (fun-gus) 2 syllables Rhymes Learn It! Spelling Test Definition noun. any of a kingdom of living things that lack chlorophyll and are parasitic or live on dead or decaying organic matter and are not considered plants Example Sentence A fungus was growing on the tree. Synonyms mushroom; toadstool; mold; mildew Antonyms rabbit Rhymes Two Syllable Rhymes (1) fungus Share with your friends: