improvise vs execute

improvise and execute both are verbs.

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

As verbs, execute is a hypernym of improvise; that is, execute is a word with a broader meaning than improvise:

Other hypernyms of improvise include do, perform.

improvise (verb)	execute (verb)
perform without preparation	sign in the presence of witnesses
manage in a makeshift way; do with whatever is at hand	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