Double vowels

Words with double vowels are a lot of fun. Here's a list of all three letter words that have both a "u" and an "e":

AUE, CUE, DUE, EAU, ECU
EMU, EUK, FEU, GUE, HUE
JEU, KUE, LEU, MEU, RUE
SUE, UEY, UKE, ULE, URE
USE, UTE

There are lots of four letter words with both letters, but there are only 55 where they're adjacent:

AGUE, BLUE, CLUE, CRUE, CUED
CUES, DEUS, DUED, DUEL, DUES
DUET, EMEU, EUGE, EUGH, EUKS
EUOI, EURO, FEUD, FEUS, FLUE
FUEL, GEUM, GLUE, GRUE, GUES
HUED, HUER, HUES, JEUX, KUEH
KUES, LEUD, LIEU, LUES, MEUS
MOUE, NEUK, NEUM, PLUE, PUER
QUEP, QUEY, ROUE, RUED, RUER
RUES, SLUE, SPUE, SUED, SUER
SUES, SUET, TRUE, UEYS, YEUK

(Ask a Singaporean or Malaysian what kue/kueh is, if you're curious! You'll get a "Yum!")