What is another word for "extra"?

Roget's Thesaurus (1911) lists these synonyms for "extra": about, above, accessory, addition, additional, additive, adjectitious, adscititious, air, alone, along, also, and, around, ascititious, bargain, belle, besides, boot, circumjacence, conjointly, conjunction, covering, disc, discoid, disk, eccentric, eccentricity, eke, else, etoile, excentric, excentricity, exterior, exteriority, exteriorly, external, externally, extrados, extralimitary.