whitefly vs homopterous insect

whitefly and homopterous insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
whitefly	Yes	No	No	No
homopterous insect	Yes	No	No	No

As nouns, homopterous insect is a hypernym of whitefly; that is, homopterous insect is a word with a broader meaning than whitefly:

whitefly: minute insect that feeds on plant juices; related to scale insects
homopterous insect: insects having membranous forewings and hind wings

Other hypernyms of whitefly include homopteran.

whitefly (noun)	homopterous insect (noun)
minute insect that feeds on plant juices; related to scale insects	insects having membranous forewings and hind wings