Vocabulary consisting only from characters you are able to read
笑い
わらい
(1)laugh/laughter/ (2)smile/ (3)sneer/(P) jlpt3
一兆
いっちょう
1,000,000,000,000, one trillion, one billion (obs. British)mix
兆
ちょう
(1)sign, omen, indication, portent, (num) (2)10^12, 1,000,000,000,000, trillion (American), (obs) billion (British) mix