Vocabulary consisting only from characters you are able to read
戦う
tatakau
to fight/to battle/to combat/to struggle against/to wage war/to engage in contest/(P)godan, sensou, verb, vintrans
課題
kadai
subject/theme/task/challenge/issue/matter/(P)jlpt3, leda1
頭
kašira
(1)head/ (2)top/ (3)hair (on one's head)/ (4)top structural component of a kanji/(P) leda1
試練
širen
test, trial, probation, ordeal, tribulationmix
億
oku
(num) 100,000,000, hundred millionjlpt4
種
šu
(1)kind, variety, (2)(biological) species, (3)(abbr) (logical) species mix
関節
kansecu
joints (knee joint, elbow joint, etc.)hito