- ZiB
- Zibit
- zidovudine
- Ziegfeld
- Ziegfeld Follies
- Ziegler
- zig
- zig-zag
- zigadene
- Zigadenus
- Zigadenus elegans
- Zigadenus glaucus
- Zigadenus nuttalli
- Zigadenus venenosus
- Zigadenus venenosus gramineus
- ziggurat
- zigzag
- zigzag goldenrod
- zikkurat
- zikurat
- zilch
- zill
- zillion
- Zimbabwe
- Zimbabwean
- Zimbabwean dollar
- Zimbalist
- Zimmer
- Zimmer frame
- Zinacef
- zinc
- zinc blende
- zinc cadmium sulfide
- zinc deficiency
- zinc ointment
- zinc oxide
- zinc sulfate
- zinc sulfide
- zinc sulphate
- zinc sulphide
- zinc vitriol
- zinc white
- Zinfandel
- zing
- zinger
- Zingiber
- Zingiber officinale
- Zingiberaceae
- Zinjanthropus
- zinkenite
- Zinnemann
- zinnia
- Zinnia acerosa
- Zinnia grandiflora
- zinnwaldite
- Zinsser
- Zinzendorf
- Zion
- Zion National Park
- Zionism
- Zionist
- Zionist movement
- zip
- zip by
- ZIP code
- zip fastener
- zip gun
- zip up
- Ziphiidae
- zipper
- zippo
- zippy
- Zirbanit
- zircon
- zirconia
- zirconium
- zirconium dioxide
- zirconium oxide
- zirconium silicate
- zit
- zither
- zithern
- Zithromax
- ziti
- Zizania
- Zizania aquatica
- Ziziphus
- Ziziphus jujuba
- Ziziphus lotus
- zizz