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

shad.

head :exploding_head:

dead :skull_and_crossbones:

deal.

lead :arrow_up:

leaf :fallen_leaf:

fall :fallen_leaf:

fail.

mail :postbox:

nail.

lion :lion:

Icon.

coin :currency_exchange:

cone.

once.

note.

dote :heart_eyes:

rote.

root :deciduous_tree:

tour.