"Gotta" is a slang term that is used very frequently in informal conversations. If you are tired of using the same old word, there are a few synonyms that you can use in your conversations. Some of the alternatives for "gotta" are "need to," "must," "have to," "require," "necessitate," and "should." For example, instead of saying "I gotta go to work," you can say "I should head to work now" or "I need to get to work." Another option could be "It is necessary for me to go to work now." By using these synonyms for "gotta," you can make your conversations more interesting and diverse.