verse form vs poem

verse form and poem both are nouns.

Word	Noun	Adjective	Verb	Adverb
verse form	Yes	No	No	No
poem	Yes	No	No	No

As nouns, verse form and poem are synonyms defined as:

verse form and poem: a composition written in metrical feet forming rhythmical lines

verse form (noun)	poem (noun)
a composition written in metrical feet forming rhythmical lines	a composition written in metrical feet forming rhythmical lines