To write 55000 in words, we need to break down the number into its different place values and convert each place value into words.
55000 = 50,000 + 5,000
The number 50,000 is fifty thousand, and the number 5,000 is five thousand. Therefore, we can write 55000 in words as "fifty-five thousand."
In summary, to write 55000 in words, we simply say "fifty-five thousand."