testimonialize

[ tes-tuh-moh-nee-uh-lahyz ]
/ ˌtɛs təˈmoʊ ni əˌlaɪz /

verb (used with object), tes·ti·mo·ni·al·ized, tes·ti·mo·ni·al·iz·ing.

to honor (someone) by giving or doing something testimonial.
Also especially British, tes·ti·mo·ni·al·ise.

Origin of testimonialize

First recorded in 1850–55; testimonial + -ize