brave vs fearless

brave is a noun but fearless is not a noun.

Word	Noun	Adjective	Verb	Adverb
brave	Yes	Yes	Yes	No
fearless	No	Yes	No	No

As adjectives, brave and fearless are synonyms defined as:

Other synonyms of brave include audacious, dauntless, hardy, intrepid, unfearing.

brave (noun)	fearless (noun)
people who are brave
a North American Indian warrior

brave (adjective)	fearless (adjective)
possessing or displaying courage; able to face and deal with danger or fear without flinching	oblivious of dangers or perils or calmly resolute in facing them
invulnerable to fear or intimidation	invulnerable to fear or intimidation
brightly colored and showy

brave (verb)	fearless (verb)
face and withstand with courage