Just one - Mississippi. I checked the Scrabble dictionary and Webster's Second International dictionary (around 250,000 words in each).
Delta is the greek letter D. The Mississippi is a goosefoot delta. A delta is an area of Distributaries, inasmuch as the river is formed by tributaries it arrives at the sea and divides into separate channels to enter the sea. A delta will only be formed in an area of sea which has a limited tidal range.
Minnesota, Missouri and Mississippi border the Mississippi River. They begin with the letter M.
Greenville is a city in Mississippi.
· Tupelo is a city in Mississippi
Yalobusha and Yazoo are counties in Mississippi. They begin with the letter Y.
Iowa is the only state bordering the west bank of the Mississippi River beginning with the letter I. Illinois borders the east bank of the Mississippi River.
Tupelo is a city in Mississippi.
· Indianola is a city in Mississippi
Union is a town in Neshoba County, Mississippi.
You left out an "s"... it's Mississippi (with a capital M). For fun: Mi crooked letter crooked letter i crooked letter crooked letter i humpback humpback i ...or you drop out of school in the second grade.
Guntown is a town in Lee County, Mississippi.