_yacht_yachts_
_yachtsman_yachtsmen_
_yachtswoman_yachtswomen_
_yak_yaks_
_yam_yams_
_yammer_yammered_yammering_yammers_
_yank_yanked_yanking_yanks_
_yankee_yankees_
_yap_yapped_yapping_yaps_
_yard_yards_
_yardstick_yardsticks_
_yarn_yarns_
_yashmak_yashmaks_
_yaw_yawed_yawing_yaws_
_yawn_yawned_yawning_yawns_
_yd_yds_
_year_years_yr_yrs_
_yearbook_yearbooks_
_yearn_yearned_yearning_yearnings_yearns_
_yeast_yeasts_
_yell_yelled_yelling_yells_
_yellow_yellowed_yellower_yellowest_yellowing_yellows_
_yelp_yelped_yelping_yelps_
_yemeni_yemenis_
_yeoman_yeomen_
_yes-man_yes-men_
_yes_yeses_yeah_yep_
_yeti_yetis_
_yew_yews_
_yield_yielded_yielding_yields_
_ymca_ymcas_
_yo-yo_yo-yos_
_yob_yobs_
_yobbo_yobbos_
_yodel_yodelled_yodelling_yodels_
_yoghurt_yoghurts_
_yogi_yogis_
_yoke_yoked_yokes_yoking_
_yokel_yokels_
_yolk_yolks_
_you_ya_ye_
_young_younger_youngest_
_youngster_youngsters_
_your_yer_yours_
_yourself_yourselves_
_youth_youths_
_yowl_yowled_yowling_yowls_
_yuck_yucky_
_yugoslav_yugoslavs_
_yummy_yum-yum_
_yuppie_yuppies_