VII vs seven

VII and seven both are nouns.

Word	Noun	Adjective	Verb	Adverb
VII	Yes	No	No	No
seven	Yes	Yes	No	No

As nouns, VII and seven are synonyms defined as:

Other synonyms of VII include 7, heptad, septenary, septet, sevener.

VII (noun)	seven (noun)
the cardinal number that is the sum of six and one	one of four playing cards in a deck with seven pips on the face
	the cardinal number that is the sum of six and one

VII (adjective)	seven (adjective)
	being one more than six