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

spit.

stop :vertical_traffic_light:

pots.

tots

:potato:

slot.

solo :one:

lose :cry:

hose :fire:

shoe!

hose :fire_engine:

host.

most :phone::phone::phone::phone::phone::phone::phone::phone::phone:

cost $

cast :performing_arts:

last :unamused:

lust :blush:

must!

stem :herb:

item.

time :hourglass: