Denshi Jisho — Online Japanese dictionary

生理 せいり 1: physiology;
2: menstruation; one's period; menses
Common word, Noun, No-adjective 
摂理 せつり (divine) providence; dispensation
Common word, Noun, Suru verb, No-adjective 
総理 そうり prime minister; leader; overseer (of national affairs); president
Common word, Noun, Suru verb 
代理 だいり representation; agency; proxy; deputy; agent; attorney; substitute; alternate; acting (principal, etc.)
Common word, Noun, Suru verb, No-adjective 
天理 てんり natural laws; rule of heaven
Common word, Noun 
道理 どうり reason; truth
Common word, Noun 
物理 ぶつり physics; law of nature
Common word, Noun, No-adjective 
理解 りかい understanding; comprehension; appreciation; sympathy
Common word, Noun, Suru verb 
理学 りがく 1: physical science (e.g. chemistry, biology, etc.);
2: physics;
3: lixue (Song-era Chinese philosophy);
4: (Archaism) philosophy
Common word, Noun 
理屈 りくつ theory; reason
Common word, Noun 
理系 りけい science
Common word, Noun, No-adjective 
理工 りこう science and technology
Common word, Noun 
理性 りせい reason; sense
Common word, Noun 
理想 りそう ideal; dream
Common word, Noun, No-adjective 
理念 りねん (Platonic) ideal (of how things ought to be, e.g. human rights); foundational principle; idea; conception (e.g. of the university); doctrine; ideology
Common word, Noun 
理髪 りはつ haircut
Common word, Noun, Suru verb, No-adjective 
理由 りゆう reason; pretext; motive
Common word, Noun 
理論 りろん theory
Common word, Noun 
倫理 りんり ethics; morals
Common word, Noun, No-adjective 
論理 ろんり 1: logic;
2: (No-adjective) logical
Common word, Noun 
一理 いちり (a) principle; (a) reason
Noun 
幹理 かんり superintendence; supervision; administration
Noun, Suru verb 
学理 がくり scholarly principle; scientific principle
Noun 
空理 くうり abstract or impracticable theory
Noun 
公理 こうり axiom; maxim; self-evident truth
Noun, No-adjective 
修理 しゅり repairing; mending; servicing
Noun, Suru verb, No-adjective 

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