ずっと

ずーっと ずうっと

continuously in some state (for a long time, distance), throughout, all along, the whole time, all the way

ずらっと

in a line, in a row

ずばっと

without hesitation, frankly (esp. speaking), bluntly, without shilly-shallying, straight to the point, getting to the heart of the matter

ずしっと

heavily; profoundly

ずっと前に

ずっとまえに

a long time ago

あっという間

あっというま あっとゆうま

a blink of time, the time it takes to say "Ah!"

時間ずれ

じかんずれ

time deviation, time lag, jitter

ちょっとずつ

little by little, step by step

あっという間に

あっというまに あっとゆうまに

just like that, in the twinkling of an eye, in the blink of an eye, in the time it takes to say "ah!"

自ずと

おのずと

naturally

ずんと

づんと

much, remarkably, noticeably

ずとも

even without doing, even without being

とっとと

quickly, at once, right away, hurriedly

おっとっと

おっとっと

oops, that's enough (when pouring up alcohol, etc.)

世間知らず

せけんしらず

ignorant of the ways of the world

間髪入れず

かんはついれず

immediately; instantly; with nary a pause; without a moment's delay

開かずの間

room that is forbidden to enter; locked room; unopened room

間髪おかず

かんはつおかず

immediately; instantly; with nary a pause; without a moment's delay

仲間はずれ

なかまはずれ

being left out; being ostracized