- abut
- album
- alum
- ambulate
- ambulette
- amulet
- bateau
- bauble
- beau
- beaut
- blue
- bluebell
- bubba
- bubble
- bulb
- bull
- bullet
- bumble
- bumblebee
- butt
- butte
- emulate
- luau
- lube
- lull
- lulu
- lute
- luteal
- malamute
- maul
- mule
- mull
- mullet
- mumble
- mutable
- mutate
- mute
- mutt
- mutual
- muumuu
- tableau
- tabulate
- taut
- tuba
- tubal
- tube
- tubule
- tulle
- tumble
- tumult
- tutee
- tutu
- ululate
- umlaut