| Term | Full Form | Category |
|---|---|---|
| HY | Hai Ying | Others |
| HY | Half Year | Others |
| HY | Have You..? | Others |
| HY | Hell Yeah | Others |
| HY | Helsingin Yliopisto | Others |
| HY | Henry Yeung | Others |
| HY | Here Young | Others |
| HY | Hey Yall | Others |
| HY | High Yield | Others |
| HY | High Yield steel | Others |
| HY | Highlands Youth | Others |
| HY | Hip Young - an upcoming actress/ musician from Nigeria | Others |
| Hy | Hiram | Others |
| HY | his Yiddish | Others |
| HY | Hitler Youth | Others |
| HY | Hoehn and Yahr | Others |
| HY | Hung Yeon | Others |
| Hy | Hyman | Others |