lacewing vs stink fly

lacewing and stink fly both are nouns.

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

As nouns, stink fly is a hyponym of lacewing; that is, stink fly is a word with a more specific, narrower meaning than lacewing:

lacewing: any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids
stink fly: pale green unpleasant-smelling lacewing fly having carnivorous larvae

Other hyponyms of lacewing include chrysopid, green lacewing, brown lacewing, hemerobiid, hemerobiid fly.

lacewing (noun)	stink fly (noun)
any of two families of insects with gauzy wings (Chrysopidae and Hemerobiidae); larvae feed on insect pests such as aphids	pale green unpleasant-smelling lacewing fly having carnivorous larvae