fruit fly vs dipteron

fruit fly and dipteron both are nouns.

Word	Noun	Adjective	Verb	Adverb
fruit fly	Yes	No	No	No
dipteron	Yes	No	No	No

As nouns, dipteron is a hypernym of fruit fly; that is, dipteron is a word with a broader meaning than fruit fly:

fruit fly: any of numerous small insects whose larvae feed on fruits
dipteron: insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing

Other hypernyms of fruit fly include dipteran, dipterous insect, two-winged insects.

fruit fly (noun)	dipteron (noun)
any of numerous small insects whose larvae feed on fruits	insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing