The launch of a new GVP website is scheduled for Monday, May 20, 2013.
This compilation of synonyms and selected subsidiary features of Nisyros may not be comprehensive. Subsidiary features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. A name that appears in brackets is preceded by its synonym. In some cases additional feature type, location, or elevation details are provided.
| Name | Type | Elevation | Latitude | Longitude |
| NISYROS | Stratovolcano | 698 m | 36.586°N | 27.160°E |
| Caldera | ||||
| Lava domes | ||||
| Craters | ||||
| ACHELONE | Vent | |||
| ACHEOLUS | Vent | |||
| AGIOS JOANNIS | Vent | 588 m | ||
| ALEXANDROS | Vent | |||
| ANDREAS | Vent | |||
| KAMINAKIA | Vent | |||
| LOGOTHETIS | Vent | |||
| MEGALOS POLYBOTES [POLYVOTIS MEGALOS] | Vent | |||
| MICROS POLYBOTES [POLYVOTIS MICROS] | Vent | |||
| MIKROS POLYBOTES [POLYVOTIS MICROS] | Vent | |||
| PHLEGETHON | Vent | |||
| POLYBOTES | Vent | |||
| POLYBOTES MICROS [POLYVOTIS MICROS] | Vent | |||
| POLYVOTIS MEGALOS | Vent | |||
| POLYVOTIS MICROS | Vent | |||
| STEFANOS | Vent | 110 m | ||
| STEPHANOS [STEFANOS] | Vent | 110 m | ||
| Domes | ||||
| BORIATIKO VOUNO | Dome | |||
| KARAVIOTIS | Dome | |||
| KRATIOTI | Dome | |||
| LOFOS | Dome | |||
| PRIFITIS ILIAS | Dome | 698 m | ||
| PROFIT ELIAS [PROFITIS ILIAS] | Dome | 698 m | ||
| TRAPEZINA | Dome | |||
| Thermal Features | ||||
| EMBORIO | Thermal Feature | |||
| KAILIA | Thermal Feature | |||
| NIKIA | Thermal Feature | |||
| PIRIA | Thermal Feature | |||