Vocabulary consisting only from characters you are able to read
億
おく
(num) 100,000,000, hundred millionjlpt4
鼠
ねずみ
(1)mouse, rat, (2)dark gray, dark grey, slate (color, colour); (3)mouse, rat, (4)dark gray, dark grey, slate (color, colour) doubutsu
九日
ここのか
nine days, the ninth day (of the month)jlpt5, toki
百万
ひゃくまん
(1)1,000,000, one million, million, (2)many mix