- yo-yo
- yob
- yobbo
- yobibit
- yobibyte
- yobo
- yodel
- yodeling
- yodeller
- yodh
- yoga
- Yogacara
- yoghourt
- yoghurt
- Yogi
- Yogi Berra
- yogic
- yogistic
- yogurt
- yoke
- yokel
- yokel-like
- yokelish
- Yoko Ono
- Yokohama
- Yokuts
- yolk
- yolk sac
- Yom Kippur
- Yom Kippur War
- yon
- yonder
- yore
- York
- Yorkshire
- Yorkshire fog
- Yorkshire pudding
- Yorkshire terrier
- Yorktown
- Yoruba
- Yosemite
- Yosemite Falls
- Yosemite National Park
- Yosemite toad
- yottabit
- yottabyte
- you bet
- you said it
- you-drive
- young
- young bird
- young buck
- young carnivore
- young fish
- young girl
- young lady
- young mammal
- young man
- young person
- Young Turk
- young woman
- young-bearing
- young-begetting
- younger
- youngish
- youngness
- Youngs modulus
- youngster
- Youngstown
- younker
- youth
- youth crusade
- youth culture
- youth gang
- youth hostel
- youth movement
- youth subculture
- youth-on-age
- youthful
- youthfully
- youthfulness
- yowl