Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
集合 shuugou setmath
帰国 kikoku return to one's countryjlpt3
境界 kyoukai boundarymix
召す mesu (1)(hon) to call, to invite, to send for, to summon, (2)to eat, to drink, (3)to put on, to wear, (4)to ride, (5)to catch (a cold), to take (a bath), to tickle (one's fancy), to put on (years), to godan, verb, vtrans
高原 kougen tableland/plateau/(P)leda1