caddis fly vs caddis-fly

caddis fly and caddis-fly both are nouns.

Word	Noun	Adjective	Verb	Adverb
caddis fly	Yes	No	No	No
caddis-fly	Yes	No	No	No

As nouns, caddis fly and caddis-fly are synonyms defined as:

caddis fly and caddis-fly: small moth-like insect having two pairs of hairy membranous wings and aquatic larvae

Other synonyms of caddis fly include caddice-fly, caddice fly.

caddis fly (noun)	caddis-fly (noun)
small moth-like insect having two pairs of hairy membranous wings and aquatic larvae	small moth-like insect having two pairs of hairy membranous wings and aquatic larvae