| essential(noun, characteristic, drop, part, material) |
| constituent(noun, drop, part, influence, issue) |
| element(noun, drop, part, influence, issue) |
| part(noun, drop, part, influence, issue) |
| rudiment(noun, drop, part, material, element) |
| basic(noun, adjective, characteristic, drop, part) |
| factor(noun, feature, drop, part, influence) |
| fundamental(noun, adjective, characteristic, part, element) |
| ingredient(noun, feature, drop, part, influence) |
| aspect(feature, drop, influence, issue, material) |
| circumstance(feature, influence, issue) |
| component(drop, part, influence, issue, material) |
| feature(part, influence, issue, element) |
| integrant |
| item(feature, drop, part, influence, issue) |
| makings(element, ingredient) |
| piece |
| adjunct |
| appurtenance |
| built-in(adjective, included) |