An expression of happiness is a phrase or saying that captures a feeling. An expression of happiness is also any phrase that communicates a feeling of happiness, excitement or joy. They are often words that can be easily understood. Happiness is also a state of mind, but there are several words that can be used to talk about the circumstances, causes, or intensity of pleasure. Per the website for Roget’s Thesaurus, here are some ‘words’ which are known as synonyms associated with happiness and joy: