Remember the spelling
Arkansas k/s/s
Wyoming y
Hawaii ii
Illinois s
Kansas s/s
Louisiana ou/i/s
Massachusetts ss/tt
Minnesota nn
Mississippi ss/ss/pp, i/i/i/i
Missouri ss/ou/i
Pennsylvania nn/y
Rhode Island h
Tennessee nn/ss/ee
Wisconsin c
Wyoming y
If you hesitate between the i and the y at the end of the word, I noticed only 2 state names finish with the y
New Jersey
Kentucky
2 state names have double letters in 3 different parts of the same word
Mississippi
Tennessee
The state names consisting of 2 words don’t have dashes. There are 9 of them
New Hampshire, New Jersey, New Mexico, New York (4 state names with new)
North Carolina, North Dakota
Rhode Island
South Carolina, South Dakota
The state names that have double letters. There are 9 of them
Connecticut
Hawaii
Illinois
Massachusetts, Minnesota, Mississippi, Missouri
Pennsylvania
Tennessee
1 state name ends with ing
Wyoming
By the way, the number of state names with double letters and the number of state names with double words is the same, it’s 9.