lantern-fly vs plant hopper

lantern-fly and plant hopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
lantern-fly	Yes	No	No	No
plant hopper	Yes	No	No	No

As nouns, plant hopper is a hypernym of lantern-fly; that is, plant hopper is a word with a broader meaning than lantern-fly:

lantern-fly: large brightly marked tropical insect with a process like a snout that was formerly thought to emit light
plant hopper: related to the leafhoppers and spittlebugs but rarely damages cultivated plants

Other hypernyms of lantern-fly include planthopper.

lantern-fly (noun)	plant hopper (noun)
large brightly marked tropical insect with a process like a snout that was formerly thought to emit light	related to the leafhoppers and spittlebugs but rarely damages cultivated plants