/ˌtestɪˈmoʊniəl/

tes·ti·mo·nial

BrE /ˌtestɪˈməʊniəl/

NAmE /ˌtestɪˈmoʊniəl/

a formal written statement, often by a former employer, about sb’s abilities, qualities and character; a formal written statement about the quality of sth

a glowing testimonial

The catalogue is full of testimonials from satisfied customers.

a thing that is given or done to show admiration for sb or to thank sb

a testimonial game (= to raise money for a particular player)

testimony
testament
testicle