heroic vs courageous

heroic is a noun but courageous is not a noun.

Word	Noun	Adjective	Verb	Adverb
heroic	Yes	Yes	No	No
courageous	No	Yes	No	No

heroic (noun)	courageous (noun)
a verse form suited to the treatment of heroic or elevated themes; dactylic hexameter or iambic pentameter

heroic (adjective)	courageous (adjective)
relating to or characteristic of heroes of antiquity	possessing or displaying courage; able to face and deal with danger or fear without flinching
having or displaying qualities appropriate for heroes
showing extreme courage; especially of actions courageously undertaken in desperation as a last resort
of behavior that is impressive and ambitious in scale or scope
very imposing or impressive; surpassing the ordinary (especially in size or scale)