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

これと同じ[koretoonaji] the same as this
と同じ様に[toonajiyouni] in the same way as
安定同位体[anteidouitai] stable isotope
異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice

異同[idou] difference
一口同音[ikkudouon] reading in unison
一視同仁[isshidoujin] loving every human being with impartiality
一心同体[isshindoutai] being one in body and soul
一同[ichidou] all present

白地[akarasama] plain
アジア太平洋地域[ajiataiheiyouchiiki] Asia-Pacific region
ゼロ地点[zerochiten] ground zero
リーダーシップ的地位[riidaashipputekichii] leadership position
ルーラル地域[ruuraruchiiki] rural area

渥地[akuchi] marshland
安全地帯[anzenchitai] safety zone
意気地[ikuji] self-respect
意気地無し[ikujinashi] coward
意気地のない[ikujinonai] spineless

圧接[assetsu] pressure welding
引接[insetsu] interview
応接[ousetsu] reception
応接セット[ousetsusetto] lounge suite
応接間[ousetsuma] reception room

応接室[ousetsushitsu] drawing room
外接[gaisetsu] circumscription
間接[kansetsu] indirection
間接照準射撃[kansetsushoujunshageki] indirect fire
間接税[kansetsuzei] indirect tax

ゼロ地点[zerochiten] ground zero
圧痛点[attsuuten] pressure point
一致点[icchiten] point of agreement
一点[itten] speck
一点機[ichitenki] turning point

一点張り[ittenbari] persistence
引火点[inkaten] flash point
遠地点[enchiten] apogee
遠日点[enjitsuten] aphelion

為続ける[shitsuzukeru] to continue to do
遺産相続[isansouzoku] inheritance
永続[eizoku] permanence
永続性[eizokusei] persistent
家続き[ietsuzuki] row of houses

家督相続[katokusouzoku] inheritance
共同相続人[kyoudousouzokunin] joint heir
勤続[kinzoku] continuous service
勤続者[kinzokusha] man of long service
続ぐ[tsugu] to succeed (someone in a business or inheritance)