desperate vs courageous

desperate is a noun but courageous is not a noun.

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

desperate (noun)	courageous (noun)
a person who is frightened and in need of help

desperate (adjective)	courageous (adjective)
showing extreme courage; especially of actions courageously undertaken in desperation as a last resort	possessing or displaying courage; able to face and deal with danger or fear without flinching
fraught with extreme danger; nearly hopeless
arising from or marked by despair or loss of hope
showing extreme urgency or intensity especially because of great need or desire
desperately determined
(of persons) dangerously reckless or violent as from urgency or despair