Seven letter words change one or two letter to make a new word

slither

neither

heretic

crochet

chortle

chiclet

lettice

lettice?

enticed

notched

pinched

puncher

henpeck

heckler

buckler

buckles

suckled

skulked

skunked

snicker

You can’t go from skunked to snicker in 2; you need c, i, r. Snicked would have worked.

Playing off skunked:

skinned