| keenness(noun, understanding, mind, grasp, intelligence) |
| leeriness |
| levelheadedness(understanding, knowledge, sense, judgment, wisdom) |
| long-headedness |
| lucidity(mind, intelligence, balance) |
| marbles(mind, intelligence, balance) |
| mental power(noun, expression, drive, power, strength) |
| might(noun, power, strength, energy, vigor) |
| momentum(noun, power, strength, energy, vigor) |
| muscle(noun, power, strength, energy, vigor) |
| obligation(noun, drive, power, strength, energy) |
| observation(understanding, vision, perception, awareness, intuitiveness) |
| opinion |
| pains(noun, power, strength, energy, vigor) |
| perceptivity(understanding, vision, perception, awareness, intuitiveness) |
| persistence(noun, drive, power, strength, energy) |
| perspicuity |
| persuasiveness(noun, drive, power, strength, energy) |
| philosopher |
| physical energy(noun, expression, power, strength, energy) |