4 letter (change 1 letter)

[Plane_Jane]

Nuns

 

[Cazz]

Nuts

 

[Alex1960]

Stud

 

[Plane_Jane]

Tusk

 

[Walks]

Sunk

 

[Plane_Jane]

Suck

 

[Alex1960]

Puck

 

[Plane_Jane]

Punk

 

[Alex1960]

Pink

 

[Walks]

Wink

 

[Alex1960]

Wank (of course!)

 

[FonicPPP]

Bank

 

[Cazz]

Band

 

[FonicPPP]

Bang

 

[Cazz]

Barn

 

[FonicPPP]

Burn

 

[Cazz]

Rubs

 

[FonicPPP]

Bras

 

[Cazz]

Base

 

[FonicPPP]

Arse