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

happens

shapely
(Spanish happens–you got a damn fine travel slogan, there)

spheral

shellac

callous

lucious

soulful

Soulfly

souffle

shuffle

Waffles!

(I always hear Donkey when I see that word…)

baffled

baffles

battles

startle

rattler

tatters

stealer

steeled

Steeler