Four letter Word Game

pups

tups

tubs

tabs

cabs

cobs (what we in Nottinghamshire call Rolls, or baps, or barmcakes)

robs

lobs

loss

lass

last

salt

sale

sole

mole

mule

mute

lute

lure

lurk

lark

park

pork

fork

work

wore

pore

port

porn

born

burn

barn

bare

brae

bear

beer

seer

sere

here

hire