Eighty
Part of speech: numeral
Definition: The cardinal number occurring after seventy-nine and before eighty-one, represented in Roman numerals as LXXX and in Arabic numerals as 80. Ordinal: eightieth.
Example sentence: The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
Fourscore
Part of speech: noun
Definition: Eighty