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

thicket

hotcake

hackled

tackles

slacker

stalker

ratlike

Ratlike needs a hyphen.

trailer

I just checked some online dictionaries, including Merriam Webster and Collins, and they all have it as one word.

rafters

starred

Okay.

started

stutter

twitter

swifter

fighter

relight

ringlet

tingles

elegant