4-letter words that end in is
- sais — an ancient city in N Egypt, on the Nile delta: an ancient capital of Lower Egypt.
- sris — a Hindu title of address prefixed to the name of a deity, holy person, etc.
- tais — a group of languages spoken in SE Asia, including Thai, Lao, and Shan.
- this — (used with adjectives and adverbs of quantity or extent) to the extent or degree indicated: this far; this softly.
- unis — university.
- utis — merriment or celebration
- wais — Wide Area Information Servers
- wcis — Wyoming County International Speedway
- wdis — Who Do I Start?
- ywis — certainly.