Vocabulary consisting only from characters you are able to read
早め
hajame
(something) earlymix
鼠
nezumi
(1)mouse, rat, (2)dark gray, dark grey, slate (color, colour); (3)mouse, rat, (4)dark gray, dark grey, slate (color, colour) doubutsu
緑の日
midorinohi
(n) Greenery Day (national holiday; May 4)namae, toki
七日
nanoka
seven days, the seventh day of the monthjlpt5, toki
人
hito
man, person, human being, mankindhito, jlpt5
十億
džuuoku
1,000,000,000, billion (American), (obs) milliard (British)mix
億
oku
(num) 100,000,000, hundred millionjlpt4