papule vs vesicopapule

papule and vesicopapule both are nouns.

Word	Noun	Adjective	Verb	Adverb
papule	Yes	No	No	No
vesicopapule	Yes	No	No	No

As nouns, vesicopapule is a hyponym of papule; that is, vesicopapule is a word with a more specific, narrower meaning than papule:

papule: a small inflamed elevation of skin that is nonsuppurative (as in chicken pox)
vesicopapule: a papule that changes into a blister

Other hyponyms of papule include papulovesicle.

papule (noun)	vesicopapule (noun)
a small inflamed elevation of skin that is nonsuppurative (as in chicken pox)	a papule that changes into a blister