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

愛称[aishou] pet name
異称[ishou] alias
一人称[ichininshou] first person
仮称[kashou] temporary name
雅称[gashou] correct name

改称[kaishou] renaming
偽称[gishou] assuming a false name
旧称[kyuushou] old name
敬称[keishou] title of honour
謙称[kenshou] refer to modestly

安全第一[anzendaiichi] safety first
及第[kyuudai] passing an examination
及第者[kyuudaisha] successful examinee
及第点[kyuudaiten] passing mark
次第[shidai] dependent upon

次第に[shidaini] gradually (progress into a state)
次第書き[shidaigaki] printed program
式次第[shikishidai] program of a ceremony (programme)
手当たり次第[teatarishidai] using anything one can lay one's hands on
出来次第[dekishidai] as soon as completed