Compounds of 平

• 太平楽
  (n) happy-go-lucky
• 太平州
  (n) Oceania
  Pacific Ocean countries
• 太平洋
  (n) Pacific Ocean
  (P)
• 大平洋
  (iK) (n) Pacific Ocean
• 地平線
  (n) horizon (related to land)
  (P)
• 地平面
  (n) horizontal plane
• 天平尺
  (n) (arch) Tempyou shaku (approx. 29.6 cm)
• 日本平
  (n) Nihon Plain
• 不公平
  (adj-na,n) unfairness
  injustice
  partiality
  (P)
• 不平等
  (adj-na,n) inequality
  unequal (treaties)
  unfair
  (P)
• 平たい
  (adj-i) (1) flat
  even
  level
  simple
  (2) plain (speech, etc.)
  simple
  (P)
• 平たん
  (adj-no,adj-na) flat
• 平らか
  (adj-na,n) level
  just
  peaceful
• 平らぐ
  (v5g) to be suppressed
• 平安京
  (n) ancient Kyoto
• 平安朝
  (n) Heian period (794-1185)
• 平易化
  (n,vs) simplification
• 平泳ぎ
  (n) breaststroke (swimming)
  (P)
• 平屋根
  (n) flat roof
• 平仮名
  (n) (uk) hiragana
  one of the Japanese syllabaries
  (P)
• 平家蟹
  (n) (uk) Heike crab
• 平滑化
  (n,vs) smoothing (e.g. numbers)
• 平滑筋
  (n) smooth muscle
• 平教員
  (n) common teacher
• 平均化
  (n,vs) averaging
  levelling (off)
  equalization
  standardization
  balance
• 平均台
  (n) balance beam (in gymnastics)
• 平均値
  (n) average value
  mean value
  mean
  expectation
• 平均的
  (adj-na) average
• 平均点
  (n) average mark
  mean point
  (P)
• 平均律
  (n) temperament (music)
  equal (or even) temperament