Ask, ash
ash, ask, asp, ass, ess, ism, USA, USB, USC, use
Some five letter words with a second letter S are:ascotashenaspicassayassetessayesterisletissuepsalmpsychusherusualusurp
Three letter words ending in -s are:YesBusAdsCosHasHisInsSisSosWas
Some three letter words that start with S are: sadsagsapsatsawsaxsayseaseesetsewsexsheshysicsinsipsirsissitsixslyskisobsodsonsotsowsoyspystysubsumsunsup
dosent exist
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern S-S---S--. That is, nine letter words with 1st letter S and 3rd letter S and 7th letter S. In alphabetical order, they are: suspenser suspenses suspensor
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern --SS-S---. That is, nine letter words with 3rd letter S and 4th letter S and 6th letter S. In alphabetical order, they are: possessed possesses possessor
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern AS---S-S. That is, eight letter words with 1st letter A and 2nd letter S and 6th letter S and 8th letter S. In alphabetical order, they are: asperses assesses asteisms
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern S-S-I---S. That is, nine letter words with 1st letter S and 3rd letter S and 5th letter I and 9th letter S. In alphabetical order, they are: sassiness sissiness syssitias
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern S--SS-S. That is, seven letter words with 1st letter S and 4th letter S and 5th letter S and 7th letter S. In alphabetical order, they are: sowsses stosses swisses
Buss (As in BUSS compression) Cuss Fuss
One such word is locus. Another is bonus.