plant bug vs capsid

plant bug and capsid both are nouns.

Word	Noun	Adjective	Verb	Adverb
plant bug	Yes	No	No	No
capsid	Yes	No	No	No

As nouns, capsid is a hyponym of plant bug; that is, capsid is a word with a more specific, narrower meaning than plant bug:

Other hyponyms of plant bug include mirid, mirid bug, lace bug.

plant bug (noun)	capsid (noun)
small bright-colored insect that feeds on plant juices	the outer covering of protein surrounding the nucleic acid of a virus
	a variety of leaf bug