boisterous vs fierce

boisterous and fierce both are adjectives.

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

As adjectives, boisterous and fierce are synonyms defined as:

Other synonyms of boisterous include rough.

boisterous (adjective)	fierce (adjective)
noisy and lacking in restraint or discipline	marked by extreme intensity of emotions or convictions; inclined to react violently; fervid
full of rough and exuberant animal spirits	ruthless in competition
violently agitated and turbulent	violently agitated and turbulent
	marked by extreme and violent energy