liton (bed, acc., Esperanto)
Cheers.
Luton
futon
muton
Originally defined, in 1957, as the smallest element that, when altered, can give rise to a mutant form of the organism.
mutton
Button
Don’t press it!
butto (I throw, Italian)
butts 
mutts
mutes
mates
Fates
rates
dotes
dots
dot
(how is this still open?!)
bot
blot