bluebottle vs blowfly

bluebottle and blowfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
bluebottle	Yes	No	No	No
blowfly	Yes	No	No	No

As nouns, blowfly is a hypernym of bluebottle; that is, blowfly is a word with a broader meaning than bluebottle:

bluebottle: blowfly with iridescent blue body; makes a loud buzzing noise in flight
blowfly: large usually hairy metallic blue or green fly; lays eggs in carrion or dung or wounds

Other hypernyms of bluebottle include blow fly.

bluebottle (noun)	blowfly (noun)
blowfly with iridescent blue body; makes a loud buzzing noise in flight	large usually hairy metallic blue or green fly; lays eggs in carrion or dung or wounds
an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers