An "e s s letter" typically refers to a letter that is part of an abbreviation or acronym, but the term itself is not widely recognized. It could possibly relate to specific contexts, such as a type of communication, a designation in a particular field, or a letter format used in certain organizations. Without additional context, it's challenging to provide a precise definition. If you have a specific context in mind, please clarify for a more accurate answer.
The final E is silent. The letter pair SC has an S sound, so C could be considered "silent" -- however, either an S alone or a C alone could have the S sound when follow by E, as in seen or centennial.
S
* seek * reek * skee * rees * seer * sere
Kismet is one.
S
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern E-EE-S-S. That is, eight letter words with 1st letter E and 3rd letter E and 4th letter E and 6th letter S and 8th letter S. In alphabetical order, they are: epeeists
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern S-S-E--E. That is, eight letter words with 1st letter S and 3rd letter S and 5th letter E and 8th letter E. In alphabetical order, they are: sesterce sestette suspence suspense
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern E-S-EI-S. That is, eight letter words with 1st letter E and 3rd letter S and 5th letter E and 6th letter I and 8th letter S. In alphabetical order, they are: eisweins
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern SESS--E. That is, seven letter words with 1st letter S and 2nd letter E and 3rd letter S and 4th letter S and 7th letter E. In alphabetical order, they are: sessile
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern E-S--E-S. That is, eight letter words with 1st letter E and 3rd letter S and 6th letter E and 8th letter S. In alphabetical order, they are: easeless easiness ensteeps ensurers ensweeps essayers
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ESSE--E. That is, seven letter words with 1st letter E and 2nd letter S and 3rd letter S and 4th letter E and 7th letter E. In alphabetical order, they are: essence
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern SU-E-E-S. That is, eight letter words with 1st letter S and 2nd letter U and 4th letter E and 6th letter E and 8th letter S. In alphabetical order, they are: sureness
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern E-S-NE-S. That is, eight letter words with 1st letter E and 3rd letter S and 5th letter N and 6th letter E and 8th letter S. In alphabetical order, they are: easiness
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern E-SE--SS. That is, eight letter words with 1st letter E and 3rd letter S and 4th letter E and 7th letter S and 8th letter S. In alphabetical order, they are: easeless
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern S--SE-E. That is, seven letter words with 1st letter S and 4th letter S and 5th letter E and 7th letter E. In alphabetical order, they are: subsere
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern ES-E---S. That is, eight letter words with 1st letter E and 2nd letter S and 4th letter E and 8th letter S. In alphabetical order, they are: esnecies essences
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ES-E--S. That is, seven letter words with 1st letter E and 2nd letter S and 4th letter E and 7th letter S. In alphabetical order, they are: esteems