cone-nosed bug vs assassin bug

cone-nosed bug and assassin bug both are nouns.

Word	Noun	Adjective	Verb	Adverb
cone-nosed bug	Yes	No	No	No
assassin bug	Yes	No	No	No

As nouns, assassin bug is a hypernym of cone-nosed bug; that is, assassin bug is a word with a broader meaning than cone-nosed bug:

cone-nosed bug: large bloodsucking bug
assassin bug: a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals

Other hypernyms of cone-nosed bug include reduviid.

cone-nosed bug (noun)	assassin bug (noun)
large bloodsucking bug	a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals