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
働き
hataraki
(1)work, labor, labour, (2)achievement, performance, ability, talent, (3)salary, income, earnings, (4)action, activity, workings, function, operation, movement, motion, (5)(ling) conjugation, inf jlpt3
農薬
nouyaku
agricultural chemical (i.e. pesticide, herbicide, fungicide, etc.), agrochemical, agrichemical
頭
kashira
(1)head/ (2)top/ (3)hair (on one's head)/ (4)top structural component of a kanji/(P) leda1
観察
kansatsu
observation, surveysuru
課題
kadai
subject/theme/task/challenge/issue/matter/(P)jlpt3, leda1
億
oku
(num) 100,000,000, hundred millionjlpt4
話題
wadai
topic, subjectmix
験算
kenzan
verification of accounts, checking figures, arithmetic checksuru