strenuosity vs vigor

strenuosity and vigor both are nouns.

Word	Noun	Adjective	Verb	Adverb
strenuosity	Yes	No	No	No
vigor	Yes	No	No	No

As nouns, vigor is a hypernym of strenuosity; that is, vigor is a word with a broader meaning than strenuosity:

Other hypernyms of strenuosity include energy, vigour, zip.

strenuosity (noun)	vigor (noun)
intense energy	active strength of body or mind
	an imaginative lively style (especially style of writing)
	forceful exertion