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

secret

crypts

Egypts

(if there were more than one)

typist

trippy

tropic

optics

tricot

rotten

retour

routed

roster

roosts

strong

rotgut

yogurt

Toured

droned

denude

(In the history of [del]my bed[/del] ART!)

BIP:

dunned