lacewing vs lacewing fly

lacewing and lacewing fly both are nouns.

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

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

lacewing and lacewing fly: any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids

lacewing (noun)	lacewing fly (noun)
any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids	any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids