There are various synonyms for the word "not catch" which you can use to make your language more interesting and diverse. Firstly, you can use the term "miss", which means to fail to hit, catch, or make contact with something. Additionally, "overlook" is another great term that refers to not noticing, seeing, or perceiving someone or something. Another synonym that you can use is "escape", which implies that someone or something has avoided being captured or noticed. Moreover, "fumble" refers to a clumsy attempt at catching something, while "botch" implies a failed attempt at doing something. Lastly, "lose" means to be unable to find, catch, or keep something, making it an appropriate alternative for "not catch".