Admission, assailant, assassins, assaulted, assaulter, assembled, assembles, assenters, assenting, asserters, asserting, assertion, assertive, assessing, assessors, assignees, assigning, assignors, assistant, assisting, assistors, associate, assonance, assurance, assuredly, bassinets, blessings, casserole, cessation, cesspools, classroom, cusswords, dissected, dissenter, dissident, dissuaded, embossing, emissions, essayists, essential, focusing, grassiest, harassing, impassive, issuances and issueless are 9 letter words that contain SS. Additional words include joylessly, massacred, massacres, massively, messaging, messenger, misspells, misspoken, necessity, newsstand, omissions, ossifying, passbooks, passenger, passively, passwords, pessimist, possessor, pussyfoot, undressed and witnesses.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 7 words with the pattern S--I-N--S. That is, nine letter words with 1st letter S and 4th letter I and 6th letter N and 9th letter S. In alphabetical order, they are:
saliences
sapidness
sapiences
solidness
squinnies
staidness
sweirness
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A-----I-A. That is, nine letter words with 1st letter A and 7th letter I and 9th letter A. In alphabetical order, they are: asafetida
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-----A-A. That is, nine letter words with 1st letter I and 7th letter A and 9th letter A. In alphabetical order, they are: inamorata
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern AI--A----. That is, nine letter words with 1st letter A and 2nd letter I and 5th letter A. In alphabetical order, they are: airmailed
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern AI-----A-. That is, nine letter words with 1st letter A and 2nd letter I and 8th letter A. In alphabetical order, they are: airstream
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I------IS. That is, nine letter words with 1st letter I and 8th letter I and 9th letter S. In alphabetical order, they are: ixodiasis
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I----H-I-. That is, nine letter words with 1st letter I and 6th letter H and 8th letter I. In alphabetical order, they are: inukshuit
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern W--I----I. That is, nine letter words with 1st letter W and 4th letter I and 9th letter I. In alphabetical order, they are: waribashi
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern K---I---A. That is, nine letter words with 1st letter K and 5th letter I and 9th letter A. In alphabetical order, they are: kadaitcha
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A-I-F----. That is, nine letter words with 1st letter A and 3rd letter I and 5th letter F. In alphabetical order, they are: acidfreak
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern W-----A-A. That is, nine letter words with 1st letter W and 7th letter A and 9th letter A. In alphabetical order, they are: whakapapa
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-A---R--. That is, nine letter words with 1st letter I and 3rd letter A and 7th letter R. In alphabetical order, they are: inaugural
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I---I--Z-. That is, nine letter words with 1st letter I and 5th letter I and 8th letter Z. In alphabetical order, they are: italicize