Foggier is a term which is used to describe a situation or an object which is unclear, hazy or lacking in clarity. If you are looking for synonyms for this word, you may consider using other terms such as murky, obscure, uncertain, indistinct, misty, and cloudy. All of these words bear a similar meaning to foggier, indicating that something is not completely clear or distinct. The choice of the word you use may depend on the context, but all of these words can be used interchangeably and will convey a sense of haziness or uncertainty.