vehement vs fierce

vehement and fierce both are adjectives.

Word	Noun	Adjective	Verb	Adverb
vehement	No	Yes	No	No
fierce	No	Yes	No	No

As adjectives, vehement and fierce are synonyms defined as:

vehement and fierce: marked by extreme intensity of emotions or convictions; inclined to react violently; fervid

Other synonyms of vehement include tearing, trigger-happy, violent.

vehement (adjective)	fierce (adjective)
marked by extreme intensity of emotions or convictions; inclined to react violently; fervid	marked by extreme intensity of emotions or convictions; inclined to react violently; fervid
characterized by great force or energy	ruthless in competition
	violently agitated and turbulent
	marked by extreme and violent energy