Intumesce is a unique word that means "to swell up" or "to expand." However, if you're looking for synonyms that can help you express the same idea in different ways, several options exist. Some of the synonyms for intumesce are increase, enlarge, inflate, augment, escalate, expand, bloat, puff up, and distend. These words all convey some form of swelling, expansion, or growth. Using synonyms can help you add variety to your writing, convey a different tone, or provide a different emphasis on the same idea. So next time you're looking for an alternative word to intumesce, consider using one of its many synonyms.