"Thin-bellied" is a descriptive term used to describe someone with a slim midsection. There are various synonyms available that can be used instead of thin-bellied such as flat-bellied, slim-waisted, lean-bellied, slender-bellied. Additionally, other words that can be used to describe someone who has a thin-bellied appearance include toned, skinny, petite, svelte and slender. These descriptive words can be used interchangeably in a sentence, depending on the context that one wants to bring about in the description. The use of synonyms for thin-bellied enhances the linguistic creativity of a descriptive sentence, and it is a better tool for communication.