vigor vs forcefulness

vigor and forcefulness both are nouns.

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

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

Other hypernyms of vigor include force, strength.

vigor (noun)	forcefulness (noun)
active strength of body or mind	physical energy or intensity
an imaginative lively style (especially style of writing)
forceful exertion