| unessential(noun, adjective, casual, useless, extra) |
| unnecessary(adjective, extraordinary, new, spare, insignificant) |
| dispensable(adjective, spare, extreme, useless, extra) |
| less important |
| unneeded(adjective, extraordinary, new, spare, fresh) |
| non-essential(noun, adjective) |
| nonessential(noun, adjective, important, spare, insignificant) |
| unimportant(adjective, small, insignificant, trivial, extra) |
| expendable(adjective, spare, extreme, useless, extra) |
| superfluous(adjective, extraordinary, new, spare, fresh) |
| needless(adjective, extraordinary, new, spare, fresh) |
| redundant(adjective, extraordinary, new, spare, fresh) |
| extraneous(adjective, extraordinary, new, spare, insignificant) |
| immaterial(adjective, insignificant, unimportant, inconsequential, irrelevant) |
| insignificant(adjective, unimportant, trivial, extra, minor) |
| minor(adjective, small, insignificant, unimportant, trivial) |
| secondary(adjective, small, inferior, insignificant, unimportant) |
| unrequired(adjective, spare, extreme, casual, useless) |
| extra(noun, adjective, spare, extreme, useless) |
| extrinsic(adjective, casual, useless, extra, worthless) |