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

goatees

graters

rafters

terrain

Bactine

Fantine

bolster

You can’t get bolster from Fantine with only changing 2 letters

Playing off of Fantine:

fireman

firming

Hmm, don’t know what I did there.

framing

harming

hurling

rushing

shiners

shriner

furnish

sunfish

fission

mitosis

mission