6-Letter Word-Change one or two letters make a new word

blonde

nubile

futile

Teflon

planet

teapot

potato

Dan Quayle voice: Doesn’t potatoe have seven letters?

In play:

tiptop

pistol

stolen

Nestlé

Nested

Retsyn

Rested

insert

incest

Cretan

cretin

retain

trains