yes.
http://en.wikipedia.org/wiki/20_(number)
Twenty is a score so twenty years is a score of years.
A score is equal to twenty. "Four score and seven years" is eighty-seven years.
Twenty 'things' is a "Score". Example: Four score years is 80 years.
a score, as in "Four score and seven years..."
A score.
Sixty years. One score is twenty years.
The word for every twenty years is "score."
Eight score and ten is 170-years. A score equals twenty-years. The most famous use of the word score, is in the Gettysburg Address. Score is a slang term for a twenty-dollar bill.
Twenty.
a score is 20 twenty years, so score half means 10 years.
score
twenty years