- 女性【じょせい】 - woman, female, feminine gender 
- 男性【だんせい】 - man, male, masculine gender 
- 可能性【かのうせい】 - potentiality, likelihood, possibility, chance 
- 性格【せいかく】 - character (of a person), personality, disposition, nature, characteristics, nature (of a thing, event, etc.) 
- 個性【こせい】 - individuality, personality, quirk, idiosyncrasy, character, individual characteristic 
- 性的【せいてき】 - (relating to) gender, sex, sexual 
- 根性【こんじょう】 - willpower, guts, determination, grit, spirit, character, nature, disposition, personality 
- 相性【あいしょう】 - affinity, compatibility, chemistry (between people) 
- 性別【せいべつ】 - gender, distinction of sex, sex 
- 知性【ちせい】 - intelligence 
- 本性【ほんしょう】 - true character, real nature 
- 急性【きゅうせい】 - acute (illness) 
- 性能【せいのう】 - ability, performance, efficiency 
- 酸性【さんせい】 - acidity, acidic 
- 慢性【まんせい】 - chronic (illness) 
- 性質【せいしつ】 - nature, property, disposition 
- 理性【りせい】 - reason, reasoning power, (one's) sense 
- 人間性【にんげんせい】 - humanity, human nature 
- 異性【いせい】 - the opposite sex, isomerism 
- 性急【せいきゅう】 - hasty, rash, rushed, hurried, impatient, impetuous, quick-tempered