| Synonym | Reference | Specificity |
| alpha(2)-ARs | Exact | |
| alpha(2)-adrenoceptors | Exact | |
| ofα(2)-adrenoceptor | Exact | |
| α2-AR | Exact | |
| alpha2-AR | Exact | |
| α(2)-adrenoceptors | Exact | |
| alpha2 adrenoceptor | Exact | |
| α(2)-ARs | Exact | |
| ofalpha(2)-adrenoceptor | Exact |
| Identifier | Name | Relation |
| HGNC:282 | ADRA2B | isa |
| HGNC:283 | ADRA2C | isa |
| HGNC:281 | ADRA2A | isa |