Four letter words--Change 0 to 1 letter to make a new word

brad

drag

flag

flog

goal

gaol

glom

role

You can’t change more than one letter, Bullitt

Oops, forgot! I thought it was 1 or 2.

In play: mole

loam

amyl

meal

lame

teal

late

leaf

feal

foal

loaf