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

pace :footprints:

pact.

trap.

tray.

pray :pray:t2:

spay.

span :foggy:

spam.

wasp.

pass.

spay :dog2:

yaps :lips:

says.

sway.

yawn :yawning_face:

lawn :ear_of_rice:

pawn.

nape.

nope :heavy_multiplication_x:

Dope :sunglasses: