endorsement vs commendation

endorsement and commendation both are nouns.

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

As nouns, commendation is a hypernym of endorsement; that is, commendation is a word with a broader meaning than endorsement:

Other hypernyms of endorsement include approval.

endorsement (noun)	commendation (noun)
the act of endorsing	an official award (as for bravery or service) usually given as formal public statement
formal and explicit approval	a message expressing a favorable opinion
a promotional statement (as found on the dust jackets of books)
a speech seconding a motion
a signature that validates something