verse vs pentameter

verse and pentameter both are nouns.

Word	Noun	Adjective	Verb	Adverb
verse	Yes	No	Yes	No
pentameter	Yes	No	No	No

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

verse (noun)	pentameter (noun)
a piece of poetry	a verse line having five metrical feet
a line of metrical text
literature in metrical form

verse (verb)	pentameter (verb)
familiarize through thorough study or experience
compose verses or put into verse