- yoghurt starter
- yogi
- yogism
- yogurt
- yoho
- yoke
- yoke assembly
- yoke beam
- yoke clamp
- yoke coil
- yoke end
- yoke lever
- yoke permeameter
- yoke pin
- yoke suspension
- yoke valve
- yoke-bone
- yokefellow
- yokel
- yokemate
- yolk
- yolk envelope
- yolk nucleus
- yolk sac
- yolksac
- yolky
- yom kippur
- yomp
- yon
- yonder
- yoop
- yore
- york
- yorkshire pudding
- you
- you bet
- young
- young cheese
- young dough
- young economy
- young fish
- young labour
- young lady
- young river
- young star
- young stock
- young volcano
- younger
- younger sibling
- youngish
- youngling
- youngster
- younker
- your
- your cable
- your letter
- your telex
- yours
- yourself
- yourselves
- youth
- youth hostel
- youth market
- youthful
- youthfully
- youthfulness
- yowl
- yoyo
- yoyo despin
- yperite
- yrast radiation
- yts
- ytterbium
- yttrium
- yttrium oxide
- yuan
- yucca
- yuck
- yucky
- yugoslav
- yugoslavian
- yukawa potential
- yukawa well
- yule
- yule-log
- yule-tide
- yum-yum
- yummy
- yuppie
- yuppies
- ywca