Vocabulary consisting only from characters you are able to read
百
hyaku
(num) 100, hundredjlpt5
十億
juuoku
1,000,000,000, billion (American), (obs) milliard (British)mix
兆
chou
(1)sign, omen, indication, portent, (num) (2)10^12, 1,000,000,000,000, trillion (American), (obs) billion (British) mix