Nouns

(n)recommendationsomething (as a course of action) that is recommended as advisable
(n)recommendation, testimonial, good wordsomething that recommends (or expresses commendation of) a person or thing as worthy or desirable
(n)recommendation, passportany quality or characteristic that gains a person a favorable reception or acceptance or admission“her pleasant personality is already a recommendation”, “his wealth was not a passport into the exclusive circles of society”