| uncalled-for(adjective, spare, extreme, useless, extra) |
| unneeded(adjective, spare, extreme, casual, useless) |
| unrequired(adjective, spare, extreme, casual, useless) |
| adventitious(adjective, outside, extrinsicality) |
| casual(adjective, slight, lower, value, inferior) |
| gratuitous(spare, extreme, useless, extra, unwarranted) |
| impertinent(adjective, insignificant, unimportant, unwarranted, inconsequential) |
| inapplicable(adjective, insignificant, unimportant, inconsequential, irrelevant) |
| inappropriate(adjective, insignificant, unimportant, useless, unwarranted) |
| irrelevant(adjective, adverb, mean, slight, lower) |
| non-essential |
| simple |
| supererogatory(adjective, spare, extreme, extra, surplus) |
| adscititious |
| extra(noun, adjective, spare, treat, extreme) |
| inadmissible(adjective, extraneous) |
| luxury(noun, adjective, extra, unnecessary, plush) |
| minor(adjective, mean, slight, lower, value) |
| other(adjective, extraneous) |
| parenthetical(adjective, extraneous) |