endorse vs endorsement

endorse is not a noun while endorsement is a noun.

Word	Noun	Adjective	Verb	Adverb
endorse	No	No	Yes	No
endorsement	Yes	No	No	No

endorse (noun)	endorsement (noun)
	the act of endorsing
	formal and explicit approval
	a promotional statement (as found on the dust jackets of books)
	a speech seconding a motion
	a signature that validates something

endorse (verb)	endorsement (verb)
sign as evidence of legal transfer
be behind; approve of
guarantee as meeting a certain standard
give support or one's approval to