congratulations

(noun) an expression of approval and commendation. Synonyms: praise, kudos, extolment. Example: "He always appreciated praise for his work."

(noun) the act of acknowledging that someone has an occasion for celebration. Synonyms: congratulation, felicitation.

(noun) (usually plural) an expression of pleasure at the success or good fortune of another. Synonyms: congratulation, felicitation. Example: "I sent them my sincere congratulations on their marriage."