Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
微分 びぶん differential (e.g. calculus)math, suru
赤い あかい redadj, iro, jlpt5
浅い あさい shallow, superficialadj, jlpt3, jlpt4
校長 こうちょう principalgakkou, jlpt4, shigoto
自白 じはく confession, acknowledgement, acknowledgmentsuru