一も二も無く[ichimonimonaku] unhesitatingly
一言二言[hitokotofutakoto] a word or two
一石二鳥[issekinichou] killing two birds with one stone
一二に及ばず[ichininioyobazu] right away
一姫二太郎[ichihimenitarou] It's good to have a girl first and then a boy

うり二つ[urifutatsu] as alike as two melons (two peas in a pod)
黄道十二宮[koudoujuunikyuu] twelve signs of the zodiac
二度[futatabi] again
最小二乗法[saishounijouhou] least-squares method
三十二分音符[sanjuunibuonpu] 32nd note

彼の人[anohito] he
殆どの人[hotondonohito] most people
アメリカ人[amerikajin] American person
クローン人間[kuroonningen] (human) clone
シゾイド人間[shizoidoningen] schizoid person

ドイツ人[doitsujin] German person
ベトナム人[betonamujin] Vietnamese (person)
ペルシア人[perushiajin] Persian person
ユダヤ人[yudayajin] Jew
愛人[aijin] lover

黄道十二宮[koudoujuunikyuu] twelve signs of the zodiac
丸十[marujuu] cross in a circle
五十音[gojuuon] the Japanese syllabary
五十音順[gojuuonjun] the syllabary order
五十三次[gojuusantsugi] the 53 Toukaidou stages

五十年祭[gojuunensai] jubilee
五十歩百歩[gojuppohyappo] six of one and a half dozen of the other
五十路[isoji] age fifty
三十戸[sanjikko] thirty houses
三十三所[sanjuusansho] any of a number of sets of thirty-three holy places enshrining Avalokitesvara (esp. those comprising a popular pilgrimage in the Kinki region)

比律賓[firippin] Philippines
一律[ichiritsu] evenness
一律減反[ichiritsugentan] reduction in area of rice under cultivation
韻律[inritsu] rhythm
黄金律[ougonritsu] The Golden Rule ("do unto others as you would have them do unto you")

音律[onritsu] metre
戒律[kairitsu] (religious) precept
紀律[kiritsu] order
軍律[gunritsu] martial law
刑律[keiritsu] criminal law

愚図愚図[guzuguzu] slowly
闇愚[angu] imbecility
愚か[oroka] foolish
愚かしい[orokashii] foolish
愚挙[gukyo] foolish undertaking

愚行[gukou] folly
愚妻[gusai] wife
愚人[gujin] fool
愚生[gusei] (primarily used in letters, etc.) I
愚癡[guchi] idle complaint