| rarely(adverb, property, very, really, extremely) |
| supplement(noun, part, increase, addition, extension) |
| uncommonly(adverb, property, little, really, hardly) |
| unnecessary(adjective, spare, unreasonable, extreme, useless) |
| perk(noun, adjective, gain, benefit, informal) |
| adventitious |
| appendage(noun, part, increase, addition, extension) |
| besides(adjective, adverb, new, spare, addition) |
| beyond(adjective, adverb, spare, excess, further) |
| especially(adverb, very, really, extremely, particularly) |
| frill(noun, treat, luxury, extravagance, addition) |
| non-essential(noun, adjective) |
| premium(noun, gain, prize, advantage, share) |
| subsidiary(noun, adjective, support, increase, lower) |
| supportive(adjective, spare, auxiliary) |
| tip(noun, adjective, spare, advantage, reward) |
| too(spare, extreme, addition, excessive, also) |
| unneeded(adjective, spare, extreme, useless, excess) |
| unusually(adverb, property, little, really, hardly) |
| adscititious(adjective, addition) |