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

御目出度う御座います[omedetougozaimasu] congratulations
急度[kitto] surely
此度[konotabi] this occasion
その都度[sonotsudo] each time it happens
度に[tabini] each time

の度に[notabini] on the occasion of
印度[indo] India
印度支那[indoshina] Indochina
沃度丁幾[youdochinki] tincture of iodine
悪性度[akuseido] malignancy