Vocabulary consisting only from characters you are able to read
外力
gairyoku
external forcemix
七日
nanoka
seven days, the seventh day of the monthjlpt5, toki
十億
juuoku
1,000,000,000, billion (American), (obs) milliard (British)mix
両立
ryouritsu
compatibility, coexistence, standing togethersuru
耳にする
miminisuru
to hear, to hear by chance, to hear by accident, to catch (the sound)suru