| principle(law, condition, foundation, basic, necessity) |
| quintessence(noun, substance, condition, effect, subject) |
| real world(noun, expression, substance, matter, truth) |
| realism(noun, matter, truth, certainty, existence) |
| realities(noun, facts) |
| reality(noun, substance, score, heart, truth) |
| realness(noun, matter, truth, certainty, existence) |
| respect(noun, feature, part, plan, point) |
| rock bottom(expression, law, foundation, basic, stipulation) |
| root(noun, support, substance, authority, heart) |
| rudiment(noun, law, condition, foundation, essence) |
| schedule(noun, feature, part, plan, point) |
| sensibility(noun, matter, truth, certainty, existence) |
| sine qua non(noun, expression, idiom, law, condition) |
| singularity(noun, feature, part, plan, point) |
| solidity(noun, law, experience, case, matter) |
| soul(noun, strength, substance, effect, subject) |
| specialty(noun, feature, part, plan, point) |
| specific aspect(noun, expression, feature, part, plan) |
| specification(noun, feature, part, plan, point) |