dobsonfly vs dobson fly

dobsonfly and dobson fly both are nouns.

Word	Noun	Adjective	Verb	Adverb
dobsonfly	Yes	No	No	No
dobson fly	Yes	No	No	No

As nouns, dobsonfly and dobson fly are synonyms defined as:

dobsonfly and dobson fly: large soft-bodied insect having long slender mandibles in the male; aquatic larvae often used as bait

Other synonyms of dobsonfly include Corydalus cornutus, dobson.

dobsonfly (noun)	dobson fly (noun)
large soft-bodied insect having long slender mandibles in the male; aquatic larvae often used as bait	large soft-bodied insect having long slender mandibles in the male; aquatic larvae often used as bait