The word overenthusiasm refers to being extremely excited or enthusiastic about something to the point of becoming excessive or intense. There are several synonyms for this word that can be used to convey the same meaning, including zeal, fervor, fervency, passion, ardor, eagerness, and intensity. These words are often used to describe someone who is overly enthusiastic and may come across as overly enthusiastic or even pushy in certain situations. It is important to note that while enthusiasm is generally considered a positive trait, overenthusiasm can be detrimental in some situations and may not be well-received by others. Therefore, it is important to use these synonyms with caution and be aware of the context in which they are used.