| Yens | Yens |
| Yeosu | Yeosu |
| Yerkesobservatoriet | Osservatorio Yerkes |
| Yerres | Yerres |
| Yes | YES |
| Yeti | Yeti |
| Yewá | Yewá |
| Yggdrasil | Yggdrasill |
| Yi-språken | Yi |
| Yie Ar Kung-Fu | Yie Ar Kung-Fu |
| Yield management | Yield management |
| Yigal Amir | Yigal Amir |
| Yima | Yima |
| Yin och yang | Yin e yang |
| Yisrael Beytenu | Yisrael Beytenu |
| Yitzhak Rabin | Yitzhak Rabin |
| Yitzhak Shamir | Yitzhak Shamir |
| yla | ululare |
| ylande | guaito |
| YLE | Yleisradio |
| ylle | lana |
| Ylämaa | Ylämaa |
| Yma Sumac | Yma Sumac |
| Ymer | Ymir |
| Ymir | Ymir |
| ymnig | abbondante |
| ymnighetshorn | cornucopia |
| ymnigt tal | numero abbondante |
| Ymnos pros tin Eleftherian | Imnos pros tin Eleftherian |
| ymp | innesto |
| ympa | innestare |
| ympa in | inoculare |
| ympkvist | talea |
| yngel | avannotto |
| yngling | ragazzo |
| Ynglingasagan | Saga degli Ynglingar |
| Ynglingaätten | Ynglingar |
| Ynglingen | Adolescenza |
| yngre | più giovane |
| Yngre jura | Giurassico superiore |
| Yngre krita | Cretacico superiore |
| Yngwie Malmsteen | Yngwie Malmsteen |
| ynklig | magro |
