recommendation vs kudos

recommendation and kudos both are nouns.

Word	Noun	Adjective	Verb	Adverb
recommendation	Yes	No	No	No
kudos	Yes	No	No	No

As nouns, kudos is a hypernym of recommendation; that is, kudos is a word with a broader meaning than recommendation:

recommendation: something that recommends (or expresses commendation of) a person or thing as worthy or desirable
kudos: an expression of approval and commendation

Other hypernyms of recommendation include congratulations, extolment, praise.

recommendation (noun)	kudos (noun)
any quality or characteristic that gains a person a favorable reception or acceptance or admission	an expression of approval and commendation
something (as a course of action) that is recommended as advisable
something that recommends (or expresses commendation of) a person or thing as worthy or desirable