execute vs serenade

execute is not a noun while serenade is a noun.

Word	Noun	Adjective	Verb	Adverb
execute	No	No	Yes	No
serenade	Yes	No	Yes	No

As verbs, serenade is a hyponym of execute; that is, serenade is a word with a more specific, narrower meaning than execute:

execute (noun)	serenade (noun)
	a song characteristically played outside the house of a woman
	a musical composition in several movements; has no fixed form

execute (verb)	serenade (verb)
sign in the presence of witnesses	sing and play for somebody
put in effect
carry out or perform an action
kill as a means of socially sanctioned punishment
murder in a planned fashion
carry out the legalities of
carry out a process or program, as on a computer or a machine