- cell
- cello
- cellule
- clef
- clone
- clue
- colleen
- colon
- colonel
- confluence
- cool
- coulee
- cull
- effluence
- feel
- fell
- felon
- fennel
- flee
- fleece
- floe
- flounce
- flue
- fluff
- fool
- foul
- fuel
- full
- funnel
- loco
- loll
- lone
- loon
- lull
- lulu
- lune
- noel
- nucleon
- null
- oleo
- uncle
- uncool