There are several different synonyms for the phrase "in gratitude," all of which express feelings of thankfulness and appreciation. Some possible alternatives include "with appreciation," "out of appreciation," "with thanks," "in thanks," "out of thanks," "in appreciation," "with gratefulness," "out of gratefulness," "in thankfulness," "with a grateful heart," and "out of a thankful heart." These phrases can be used in different contexts to express gratitude towards someone or something, such as in a thank-you note, a speech of appreciation, or a heartfelt message of thanks. Whatever the occasion, these synonyms can help convey the depth of one's gratitude in a meaningful and articulate way.