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

bail :sweat_drops:

ball :soccer:

call. :telephone_receiver:

calf.

calm.

alms.

slam.

malt.

mall :coat: :socks: :necktie: :mans_shoe:

wall :brick:

lawn. :green_square:

loan.

koan.

kona :coffee:

Noam.

moan :sob:

omen.

Nemo :fish:

Moen.

poem.