dobson vs dobson fly

dobson and dobson fly both are nouns.

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

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

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

Other synonyms of dobson include Corydalus cornutus, dobsonfly.

dobson (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
large brown aquatic larva of the dobsonfly; used as fishing bait