A billion.

Roget 98: five, cinque [Fr.], quint, quincux^†; six, half-a-dozen, half dozen; seven; eight; nine, three times three; dicker; ten, decade; eleven; twelve, dozen; thirteen; long dozen, baker's dozen; quintuplet; twenty, score; twenty-four, four and twenty, two dozen; twenty-five, five and twenty, quarter of a hundred; forty, two score; fifty, half a hundred; sixty, three score; seventy, three score and ten; eighty, four score; ninety, fourscore and ten; sestiad^†.    hundred, centenary, hecatomb, century; hundredweight, cwt.   ; one hundred and forty-four, gross.    thousand, chiliad; millennium, thousand years, grand [Coll.]; myriad; ten thousand, ban [Jap.], man [Jap.]; ten thousand years, banzai [Jap.]; lac, one hundred thousand, plum; million; thousand million, milliard, billion, trillion etc. ... show more