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

rats. :rat::rat::rat:

arts :art:

dart. :dart:

dark :night_with_stars:

mark. :x:

mart :bread: :bacon: :coconut:

trap :mouse_trap:

port. :wine_glass:

part :pleading_face:

cart :shopping_cart:

rapt.

port.

pork. :pig2:

crop.

crow~

work :muscle:

worm.

warm :sun_with_face:

farm. :tractor:

barf!