Compounds of

• イソ
  (pref) (chem) iso-
• イド
  (n) id
• イニ
  (n) (comp) .ini
• イブ
  (n) eve (esp. Christmas Eve)
  the night before
  (P)
• イヤ
  (n) (1) ear
• イン
  (n) (1) in
  (2) inn
  (P)
• イヴ
  (n) eve (esp. Christmas Eve)
  the night before
• イ調
  (n) key of A (music)
• ウィ
  (int) yes (fre: oui)
• ウイ
  (int) yes (fre: oui)
• ウソ
  (n) (uk) Eurasian bullfinch (Pyrrhula pyrrhula)
  Japanese bullfinch
• ウゾ
  (n) ouzo (gre:)
• ウッ
  (int) oof
  ough
  ulp
• ウド
  (n) (uk) udo (plant related to ginseng, used in medicine and cooking) (Aralia cordata)
• ウニ
  (n,adj-no) sea urchin
  sea urchin eggs
• ウメ
  (n) (1) plum
  Japanese apricot
  prunus mume
  (2) lowest (of a three-tier ranking system)
• ウ冠
  (n) the "lid" kanji radical
• エア
  (n) air
  (P)
• エイ
  (n) (uk) ray (fish)
  stingray
• エコ
  (n) (abbr) ecology
• エゴ
  (n) ego (lat:)
  (P)
• エス
  (n) (1) Jesus (lat:)
• エソ
  (n) (uk) lizardfish (any fish of family Synodontidae)
• エツ
  (n) (uk) Japanese grenadier anchovy (Coilia nasus)
• エネ
  (n) (abbr) energy
  (P)
• エバ
  (adv) ever
• エビ
  (n) prawn
  shrimp
  lobster
  crayfish
• エフ
  (n) (1) (abbr) tags attached to industrial equipment when defects or malfunctions are discovered
  (2) EFF
• エペ
  (n) epee (fre: epee)
  (P)
• エル
  (n) ell (unit of length, approx. 45 inches)