Zagreb is the capital of Croatia.

zany

zap

to zap in one

to zap someone

to zap someone/something

to zap through the channels

zapper

zeitgeist

zeitgeisty

to zero on something

zero hour

At zero degrees, the water freezes.

zero

zero in on something

to be on zero

to zero in on someone/something

zero tolerance

to zero in something

zest for life

zilch

zillions of times/dollars

Zip it!

zip along

zit