| Keyword | Avg CPC* |
| Organogenesis | 0.05$ |
| Orthocenter | 0.05$ |
| Orthogonality | 0.05$ |
| Orthoptera | 0.05$ |
| Orthovanadate | 0.05$ |
| Oryza | 0.05$ |
| Osazone | 0.05$ |
| Osmar | 0.05$ |
| Osmoregulation | 0.05$ |
| Osorio | 0.05$ |
| Ospina | 0.05$ |
| Ossification | 0.05$ |
| Osteitis | 0.05$ |
| Ostensible | 0.05$ |
| Ostensibly | 0.05$ |
| Osteochondritis | 0.05$ |
| Osteoglossidae | 0.05$ |
| Osteoglossum | 0.05$ |
| Ostpolitik | 0.05$ |
| Otolite | 0.05$ |
| Outguess | 0.05$ |
| Outlance | 0.05$ |
| Overburn | 0.05$ |
| Overlapped | 0.05$ |
| Overloading | 0.05$ |
| Overshoot | 0.05$ |
| Oversound | 0.05$ |
| Oviposition | 0.05$ |
| Ovogenesis | 0.05$ |
| Oxazole | 0.05$ |
| Ozawa | 0.05$ |
| Ozols | 0.05$ |
| Outbreed | 0.00$ |
| Random keywords | |
| Bag Mummy Sleeping | 0.52$ |
| Hungary | 0.30$ |
| Weight Watcher Recipes | 2.31$ |
| altemus | 0.24$ |
| dispensers | 3.57$ |
| parasites | 1.50$ |
| chilli pepper | 0.51$ |
| red-haired | 0.27$ |