Numbers

0 zero
1 one
2 two
3 three
4 four
5 five
6 six
7 seven
8 eight
9 nine
10 ten
11 eleven
12 twelve
13 thirteen
14 fourteen
15 fifteen
16 sixteen
17 seventeen
18 eighteen
19 nineteen
20 twenty
21 twenty-one
30 thirty
40 forty
50 fifty
60 sixty
70 seventy
80 eighty
90 ninety
100 a/one hundred
1,000 a/one thousand
10,000 ten thousand
100,000 a/one hundred thousand
1,000,000 a/one million
1,000,000,000 a/one billion