hellgrammiate vs dobson

hellgrammiate and dobson both are nouns.

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

As nouns, hellgrammiate and dobson are synonyms defined as:

hellgrammiate and dobson: large brown aquatic larva of the dobsonfly; used as fishing bait

hellgrammiate (noun)	dobson (noun)
large brown aquatic larva of the dobsonfly; used as fishing 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