Bastardisms refers to words or expressions that are unconventional, uncouth, or offensive to some extent. If you're looking for synonyms for this word, there are plenty of options to choose from. Some of the most common alternatives include vulgarisms, profanities, obscenities, or crudities. Other synonyms might include slang, jargon, or dialect words that are not widely accepted in formal language. In some cases, people may also use the term "colorful language" or simply "swearing" to refer to such expressions. Regardless of the terminology, it's important to remember that these words can have different meanings and connotations depending on the context and audience, so use them with care!