| root(noun, adjective, original, basic, fundamental) |
| seminal |
| significant(important, original, basic, vital, primary) |
| simon-pure(adjective, pure) |
| simplest(simple, straightforward, basic, fundamental, uncomplicated) |
| simplex(simple, straightforward, basic, uncomplicated) |
| simplified(simple, straightforward, basic, uncomplicated) |
| sinless(adjective, pure) |
| spotless(adjective, pure) |
| stainless(adjective, pure) |
| staple(adjective, lead, head, master, boss) |
| star(adjective, lead, head, master, boss) |
| structural(material, important, natural, original, basic) |
| substantive |
| substrative(important, original, basic, vital, primary) |
| superior(adjective, lead, head, master, boss) |
| supporting(important, original, basic, vital, primary) |
| sustaining(important, original, basic, vital, primary) |
| theoretical(important, original, basic, vital, primary) |
| trunk(adjective, lead, head, master, boss) |