fiercely vs fierce

fiercely is not an adjective while fierce is an adjective.

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

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

fiercely (adverb)	fierce (adverb)
in a physically fierce manner
in an emotionally fierce manner