bass, boss, cuss, fuss, hiss, jess, joss, loss, less, moss, puss, toss, suss, this, thus, cats dogs rats bats bets wets gets zits bars fits hots nuts nits there are a few more but those are off the top of the head.
Are you sure it ends in S? I am thinking jail, but if it ends in S it could be mess, pens, cans.
sand
less
The word is "souq."
bnmn
A 13-letter word that starts with "s" and ends with "s" is "schoolteachers."
Ants
soux
· umps · urns · uses
Scissors is an 8 letter word. It begins and ends with S.
An eight letter word that starts with S and ends with T: satiristshortestsmallestsmarteststagnantstalwartstiffeststridentsubtract
Sandman (starts with S ends with N - 7 letter word)