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

Hey, “racecar” is a palindrome - I never realized that before!

careers

arrears

arrests

festers

festive

striven

nervous

resolve

velours

revolve

velvety

elevate

leviate

Urban Dictionary: Leviate

vitiate

(I think you’ve used that one recently)

vitamin

I’m sure I use lots of words more than once. You?

varmint

I imagine I do as well.

warming

ingrown

downing

dawning