Sulcate is a term that refers to something with a groove or furrow. It can be used to describe anything from a leaf to a geological formation. However, if you're looking for synonyms for this term, there are plenty of options to choose from. For one, you could use the word furrowed, which implies a similar texture or pattern. You could also opt for the word grooved, which carries a similar connotation. Another option is rutted, which implies a deeper or more pronounced groove. Ultimately, there are many words that could be used as synonyms for sulcate, so the key is to choose the one that best fits the context of your writing.