Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
油田 ゆでん oilfieldleda1
小さな ちいさな smalladj, jlpt4
あぶら oilryouri
お父さん おとうさん (polite) fatherjlpt5, kazoku, leda1
tree, woodjlpt5, shokubutsu