incapacitate vs handicap

incapacitate is not a noun while handicap is a noun.

Word	Noun	Adjective	Verb	Adverb
incapacitate	No	No	Yes	No
handicap	Yes	No	Yes	No

As verbs, incapacitate and handicap are synonyms defined as:

Other synonyms of incapacitate include disable, invalid.

incapacitate (noun)	handicap (noun)
	advantage given to a competitor to equalize chances of winning
	something immaterial that interferes with or delays action or progress
	the condition of being unable to perform as a consequence of physical or mental unfitness

incapacitate (verb)	handicap (verb)
injure permanently	injure permanently
make unable to perform a certain action	put at a disadvantage
	attempt to forecast the winner (especially in a horse race) and assign odds for or against a contestant