| crucial(adjective, important, significant, original, basic) |
| elementary(adjective, important, significant, original, basic) |
| ethical |
| first(adjective, important, significant, original, basic) |
| grass-roots(adjective, important, significant, original, essential) |
| intrinsic(adjective, important, significant, original, basic) |
| key(adjective, important, significant, original, basic) |
| major(adjective, important, significant, original, basic) |
| meat-and-potatoes(adjective, important, significant, original, essential) |
| moral |
| moralistic |
| necessary(adjective, important, significant, original, basic) |
| original(adjective, important, significant, basic, vital) |
| paramount(adjective, important, significant, original, basic) |
| philosophy |
| primary(adjective, important, original, basic, vital) |
| prime(adjective, important, significant, original, basic) |
| primitive(adjective, important, significant, original, basic) |
| radical(adjective, important, original, basic, vital) |
| significant(adjective, important, original, basic, vital) |