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

weal.

laws :balance_scale:

lawn :grapes:

pawn.

wasp.

wisp.

lisp :lips:

spit.

piss :face_with_peeking_eye:

hiss :snake:

kiss :couple_with_heart_woman_man:

skis :ski:

sikh.

husk :coconut:

hush :shushing_face:

rush :man_running:t6:

rash.

hasp.

gasp :ghost:

gape :face_with_peeking_eye: