The phrase "blankety blank" is often used as a placeholder for an offensive or inappropriate word. However, there are numerous synonyms that could be used in its place. Some possible alternatives include "bleeped-out expletive," "censored curse word," "expurgated profanity," and "sanitized swear." Other options might include specific profanities that have been toned down for polite company, such as "fiddlesticks," "darn," or "heck." Ultimately, the synonym chosen will depend on the context and the speaker's personal preferences. However, it is important to avoid using expressions that may be offensive or hurtful to others.