vehemence vs ferocity

vehemence and ferocity both are nouns.

Word	Noun	Adjective	Verb	Adverb
vehemence	Yes	No	No	No
ferocity	Yes	No	No	No

As nouns, vehemence and ferocity are synonyms defined as:

Other synonyms of vehemence include fierceness, furiousness, fury, violence, wildness.

vehemence (noun)	ferocity (noun)
the property of being wild or turbulent	the property of being wild or turbulent
intensity or forcefulness of expression