misuse vs misapply

misuse is a noun but misapply is not a noun.

Word	Noun	Adjective	Verb	Adverb
misuse	Yes	No	Yes	No
misapply	No	No	Yes	No

As verbs, misuse and misapply are synonyms defined as:

misuse and misapply: apply to a wrong thing or person; apply badly or incorrectly

misuse (noun)	misapply (noun)
improper or excessive use

misuse (verb)	misapply (verb)
change the inherent purpose or function of something	apply to a wrong thing or person; apply badly or incorrectly
apply to a wrong thing or person; apply badly or incorrectly