Answer: eighty

AnswerCrossword Clue
EIGHTY

Fourscore

EIGHTY

Top score on any PSAT segment

EIGHTY

Year in which the Colosseum opened

EIGHTY
Mercury's atomic number
EIGHTY
Four score
EIGHTYNumber in a Verne title
EIGHTYSan Francisco-to-Teaneck interstate
EIGHTYInterstate through Cheyenne
EIGHTYTop number in keno
EIGHTYA ripe old age.
EIGHTYFourscore.
EIGHTYNumber for Phileas Fogg.
EIGHTYSeptuagenarian's goal
EIGHTYHighest number in keno
EIGHTYFast clip on the road
EIGHTYYou might get a ticket for doing this
EIGHTYA speedster may do it
EIGHTYNumber retired for Steve Largent and Jerry Rice
EIGHTYDays needed to travel the world?
EIGHTYVerne title number
EIGHTYFogg's allotment of days
EIGHTYNumber of days it took Phileas Fogg to go around the world