testimonial

(noun) something that serves as evidence. Synonyms: testimony. Example: "His effort was testimony to his devotion."

(noun) something given or done as an expression of esteem. Synonyms: tribute.

(noun) something that recommends (or expresses commendation of) a person or thing as worthy or desirable. Synonyms: recommendation, good word.

(adj) expressing admiration or appreciation. Example: "Testimonial dinner."

(adj) of or relating to or constituting testimony.