| Theorist |
| Daydreamer |
| Pensive one |
| Deep thinker |
| Thoughtful one |
| Meditative one |
| Pensive person |
| One who ponders |
| Thoughtful type |
| Thoughtful sort |
| One who meditates |
| One who ruminates |
| Contemplative one |
| Contemplative sort |
| Person who ponders |
| One in deep thought |
| One deep in thought |
| Contemplative person |
| Person deep in thought |
| Relative of a thinker. |
| One in deep meditation |
| Person given to quiet contemplation |