antlion vs antlion fly

antlion and antlion fly both are nouns.

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

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

antlion and antlion fly: winged insect resembling a dragonfly; the larvae (doodlebugs) dig conical pits where they wait to catch e.g. ants

Other synonyms of antlion include ant lion.

antlion (noun)	antlion fly (noun)
winged insect resembling a dragonfly; the larvae (doodlebugs) dig conical pits where they wait to catch e.g. ants	winged insect resembling a dragonfly; the larvae (doodlebugs) dig conical pits where they wait to catch e.g. ants
the larva of any of several insects