The word "anniversarily" means "in the manner of or relating to an anniversary." Synonyms for this term include "commemoratively," "festively," "ceremoniously," and "observantly." These words suggest a sense of ceremony or special attention paid to an anniversary or celebration. Other synonyms may include "nostalgically," "traditionally," and "memorably," which convey a sense of the importance and significance of the occasion. Regardless of the exact synonym used, all of these words invoke a feeling of remembrance and honor, marking an important milestone or event.