potato tuberworm vs caterpillar

potato tuberworm and caterpillar both are nouns.

Word	Noun	Adjective	Verb	Adverb
potato tuberworm	Yes	No	No	No
caterpillar	Yes	No	No	No

As nouns, caterpillar is a hypernym of potato tuberworm; that is, caterpillar is a word with a broader meaning than potato tuberworm:

potato tuberworm: larva of potato moth; mines in leaves and stems of e.g. potatoes and tobacco
caterpillar: a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth

potato tuberworm (noun)	caterpillar (noun)
larva of potato moth; mines in leaves and stems of e.g. potatoes and tobacco	a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth