Incomestible is a word that is often used to describe food that is not fit for human consumption. However, there are various synonyms for this term that can be used to convey the same meaning. These synonyms include indigestible, unpalatable, inedible, tasteless, unappetizing, unsavory, uninviting, uneatable, and inedible. These words can be used interchangeably with incomestible to describe food that is not nutritious or satisfying for humans to eat. It is important to note that these words do not necessarily mean that the food is harmful or toxic, but rather that it is not enjoyable or desirable to eat.