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

teen.

feet :footprints:

Deet.

deer :deer:

read :bookmark:

dead :skull_and_crossbones:

lead :us_outlying_islands:

deal.

leaf :leaves:

fall :fallen_leaf:

fail :frowning:

naïf.

fine :grinning:

fife.

file :card_index_dividers:

film.

mile :walking_man:

lime.

limb :leg:

bile :nauseated_face: