Compounds of

• ドメ
  (n) (abbr) domestic
• ドラ
  (n) (abbr) mah-jongg tile that doubles the score of any hand (or the rule set that includes these tiles)
• ドル
  (n) (1) dollar
  (2) doll
  (P)
• ドン
  (n) Don (Spanish honorific) (spa:)
  (P)
• ド肝
  (n) guts
  pluck
  nerve
  spirit
• ナウ
  (adj-na,n) now
  "in"
  trendy
  (P)
• ナサ
  (n) National Aeronautics and Space Administration
  NASA
• ナチ
  (n) (abbr) Nazi (ger:)
  Nationalsozialist
  (P)
• ナノ
  (n,pref) nano-
  10^-9
  (P)
• ナビ
  (n) (abbr) navigator
  (car) navigation system
• ナル
  (n,adj-na) (abbr) (sl) narcissistic
• ナレ
  (n) (abbr) narration
  narrator
• ナ変
  (n) (abbr) irregular conjugation (inflection, declension) of verbs ending in "nu" (in written Japanese)
• ニー
  (n) knee
  (P)
• ニシ
  (n) (uk) small spiral-shelled snail
• ニス
  (n) (abbr) varnish
• ニベ
  (n) (1) drum
  croaker (any fish of the family Sciaenidae)
  (2) Nibe croaker (Nibea mitsukurii)
• ニラ
  (n) (uk) Chinese chive
  garlic chive (Allium tuberosum)
• ニ調
  (n) key of D (music)
• ヌー
  (n) gnu
• ヌル
  (n,adj-no) null
• ヌ行
  (n) classification for Japanese verb with the dictionary form ending in "nu"
  "na" column or row of the kana syllabary
• ネオ
  (n,pref) neo
  (P)
• ネガ
  (n) (photographic) negative
  (P)
• ネギ
  (n) (uk) Welsh onion (species of scallion, Allium fistulosum)
  green onion
  spring onion
• ネス
  (suf) -ness
  (P)
• ネズ
  (n) (uk) Juniperus rigida
• ネタ
  (n) (1) material
  joke material
  contents
  proof
  (2) topping of nigiri sushi
• ネベ
  (n) permanent snowpatch (fre: neve)
• ネル
  (n) (abbr) flannel