There aren't many words that are synonyms for the word "Tena." "Tena" is a name and can't be substituted with any other term. However, "Tena" can also be an abbreviation for "tenacity," which means having the quality of being determined and persistent. Synonyms for "tenacity" could include "perseverance," "persistence," "determination," "resilience," and "steadfastness." These words all describe qualities of being persistent and not giving up in the face of adversity. While the name "Tena" may not have any synonyms, the word it can abbreviate shares a strong bond with other terms that describe determination and resilience.