There are several synonyms for the expression "kissed someone's feet." Among the most common are "paid homage," "showed reverence," "worshipped," and "paid obeisance." These terms suggest a deep level of respect or devotion, and may be used to describe actions such as bowing, kneeling, or even prostrating oneself before someone in a gesture of submission or admiration. Other synonyms might include terms like "acknowledged authority," "honored," or "deferred to," all of which convey a sense of respect or admiration for someone's power or status. Ultimately, the choice of words will depend on the specific context and the level of reverence or admiration being expressed.