green apple aphid vs Aphis pomi

green apple aphid and Aphis pomi both are nouns.

Word	Noun	Adjective	Verb	Adverb
green apple aphid	Yes	No	No	No
Aphis pomi	Yes	No	No	No

As nouns, green apple aphid and Aphis pomi are synonyms defined as:

green apple aphid and Aphis pomi: bright green aphid; feeds on and causes curling of apple leaves

Other synonyms of green apple aphid include apple aphid.

green apple aphid (noun)	Aphis pomi (noun)
bright green aphid; feeds on and causes curling of apple leaves	bright green aphid; feeds on and causes curling of apple leaves