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

bestial

plastic

Calypso

scalped

percale

percent

serpent

panther

thermal

slather

reality

realtor

(Realtor is not a Scrabble-acceptable word, it is a commercial trademark.)

Arrests.

siestas

We ain’t playin’ Scrabble.

satisfy

fantasy

fastens

hastens

stashed

satchel