| Heliotrop | heliotrope |
| Allotrop | allotrope |
| allotrop | allotropic |
| neurotrop | neurotropic |
| Helios | Helios |
| Heliox | heliox |
| Heliport | heliport |
| Helikon | helicon |
| Helion | helion |
| Heliostat | heliostat |
| Helot | helot |
| hellrot | bright red |
| Biotop | biotope |
| anisotrop | anisotropic |
| neurotroph | neurotrophic |
| oligotroph | oligotrophic |
| Azeotrop | azeotrope |
| azeotrop | azeotropic |
| Egotrip | ego trip |
| ionotrop | ionotropic |