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

sputter

( b_d, Cowabunga!)

spouted

sprouts

Proteus

trouper

trooped

swooped

powdery

wordier

roadies

broader

broaden

meander

dreamer

married

ramrods

armorer

urogram

(zymurgy in three.)

groaner
(zymurgy in four.) :o

narrows