• 級きゅう

  (school) grade, year, class

• 進級しんきゅう

  promotion (school, military, etc.)

• 昇級しょうきゅう

  promotion, advancement

• 等級とうきゅう

  grade, class, degree, rank, rating, order, points

• 上級じょうきゅう

  upper level, upper grade, high rank, advanced level, senior level, upper class

• 学級がっきゅう

  (school) class

• 初級しょきゅう

  elementary level, beginner level

• 同級どうきゅう

  the same grade, same class

• 階級かいきゅう

  (social) class

• 一級いっきゅう

  one grade, first-class, primary

• 中級ちゅうきゅう

  intermediate level

• 高級こうきゅう

  high-class, high-grade, high-quality, high-end, luxury

• 下級かきゅう

  lower grade, low class, junior (officer)

• 最高級さいこうきゅう

  highest grade, top class

• 同級生どうきゅうせい

  classmate

• フライ級フライきゅう

  fly-weight (boxer)

• ミドル級ミドルきゅう

  middleweight class

• 中産階級ちゅうさんかいきゅう

  middle class, bourgeoisie

• 高級ホテルこうきゅうホテル

  high-class hotel, luxury hotel

• バンタム級バンタムきゅう

  bantam-weight (boxer)

• 級数きゅうすう

  series

• 級長きゅうちょう

  head of class, monitor

• 級別きゅうべつ

  grading, classification

• 級友きゅうゆう

  classmate, friend in the same class

• 単級たんきゅう

  single-grade (classroom)

• 全級ぜんきゅう

  the whole class

• 弩級どきゅう

  dreadnought class (of warship)

• 首級しゅきゅう

  decapitated head of an enemy

• 船級せんきゅう

  ship's classification

• 降級こうきゅう

  downgrading, demotion, degradation, lowering of position (or rank, etc.)

• Ｂ級ビーきゅう

  class-B, B class, B grade, second rate

• Ｓ級エスきゅう

  superior, special class, higher than A class, extraordinary

• 二級にきゅう

  second grade, second class, secondary

• 特級とっきゅう

  high grade, special grade, classy

• 分級ぶんきゅう

  classification (of particles, using fluid resistance)

• 超級ちょうきゅう

  very advanced level

• 三級さんきゅう

  third grade, third class, tertiary

• 低級ていきゅう

  low-grade, low-class, low-quality, vulgar, cheap

• 雲級うんきゅう

  classification of clouds

• 審級しんきゅう

  instance (e.g. first instance, second instance, etc. in a legal proceeding)

• 原級げんきゅう

  one's former grade

• 通級つうきゅう

  receiving special-needs support while attending a regular school

• Ａ級エーきゅう

  class-A, A class, A grade

• 下級生かきゅうせい

  student in a lower grade, underclassman

• 特級品とっきゅうひん

  special grade article, superfine brand

• 下級職かきゅうしょく

  subordinate post

• 特級酒とっきゅうしゅ

  highest or finest quality sake

• 上級生じょうきゅうせい

  student in a higher grade, upperclassman

• 高級車こうきゅうしゃ

  luxury car

• 階級章かいきゅうしょう

  rank insignia