horsefly vs clegg

horsefly and clegg both are nouns.

Word	Noun	Adjective	Verb	Adverb
horsefly	Yes	No	No	No
clegg	Yes	No	No	No

As nouns, horsefly and clegg are synonyms defined as:

horsefly and clegg: large swift fly the female of which sucks blood of various animals

Other synonyms of horsefly include cleg, horse fly.

horsefly (noun)	clegg (noun)
large swift fly the female of which sucks blood of various animals	large swift fly the female of which sucks blood of various animals
winged fly parasitic on horses