HA
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| HA | Headache | - | Medical(slang) |
| HA | Apogee Altitude | - | Organizations |
| HA | Hazard Analysis | - | Organizations |
| HA | High Altitude | - | Organizations |
| HA | Haiti (FIPS 10-4 Country Code) -High Availability | - | Astronomy |
| HA | Hausa Language (ISO 639-1 Code) - Hectare | - | Astronomy |