Common words:
* Guide
* Ruin
* Suit
* Juice
* Tuition
* Cruiser
Less common words:
* Cuitlahuac (an Aztec emperor)
* Kuiper (a belt of icy objects in the outer Solar System)
* Sluis (a small town in the Netherlands)
* Luid (a word meaning "loud" in Dutch)
Proper Nouns:
* Luis (a Spanish name)
* Neil (a common English name)
* Reid (a common English surname)
This isn't an exhaustive list, but it gives you a good starting point. The "ui" combination often creates the long "i" sound, but it can be tricky because sometimes it makes a different sound (like in "build" or "fruit").