Gown
Group
Grow
Grown
Grownup
Guns
Nous
Onus
Opus
Ours
Owns
Pong
Pons
Pour
Prog
Prong
Pros
Prow
Rung
Runs
Snow
Snug
Song
Soup
Sour
Spur
Spurn
Sung
Sworn
Swung
Upon
Worn
Wrong