| critical(adjective, essential, principal) |
| material(adjective, body, essential, basic, absolute) |
| meat and potatoes(expression, adjective, idiom, basic, absolute) |
| primitive(adjective, body, material, natural, animate) |
| substratal(adjective, essential, basic, absolute, fundamental) |
| vital(adjective, material, natural, essential, basic) |
| capital(essential, fundamental, principal, elementary) |
| chief(essential, fundamental, principal, elementary) |
| cold(adjective, basic, absolute, fundamental) |
| ideal(adjective, basic, absolute, fundamental) |
| name of game(expression, idiom, absolute, constitutional) |
| name of the game(expression, adjective, idiom, basic, absolute) |
| nitty-gritty(adjective, basic, absolute, fundamental) |
| nub(adjective, basic, absolute, fundamental) |
| perfect(adjective, basic, absolute, fundamental) |