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

lint!

pint :beer:

Punt.

runt.

ruin :new_moon:

rune :scorpius:

tune :musical_note:

unit👻

turn.

burn :fire:

gurn :grimacing:

rung :ladder:

gnus.

sung :heavy_check_mark:

guns :gun:

snog :kiss_woman_man:

snow :snowman_with_snow:

snot :nose:

knot🙂

oink!