| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | extra, supplementary |
| Synonyms: | added, affixed, appended, further, increased, more, new, on the side, option, other, over-and-above, padding, perk, spare, supplementary |
| Antonyms: | necessary |
| Main Entry: | ancillary |
| Part of Speech: | adjective |
| Definition: | extra; supplementary |
| Synonyms: | accessory, accompanying, additional, adjuvant, appurtenant, attendant, attending, coincident, collateral, concomitant, contributory, incident, satellite, secondary, subordinate, subservient, subsidary |
| Antonyms: | necessary, needed |
| Main Entry: | extra |
| Part of Speech: | adjective |
| Definition: | accessory; excess |
| Synonyms: | added, additional, ancillary, another, auxiliary, beyond, button, extraneous, extraordinary, fresh, further, fuss*, gingerbread, gravy, ice*, in addition, in reserve, in store, inessential, lagniappe, leftover, more, needless, new, one more, optional, other, over and above, perk*, plus, redundant, reserve, spare, special, superfluous, supernumerary, supplemental, supplementary, surplus, tip, unnecessary, unneeded, unused |
| Antonyms: | basic, elementary, essential, fundamental, integral, necessary |
| Main Entry: | extraneous |
| Part of Speech: | adjective |
| Definition: | unneeded; irrevelant |
| Synonyms: | accidental, additional, adventitious, beside the point, extra, foreign, immaterial, impertinent, inadmissible, inapplicable, inapposite, inappropriate, incidental, inessential, needless, nonessential, off the subject, peripheral, pointless, redundant, superfluous, supplementary, unconnected, unessential, unnecessary, unrelated |
| Antonyms: | appropriate, basic, essential, integral, necessary, needed, pertinent, relevant |
| Main Entry: | odd |
| Part of Speech: | adjective |
| Definition: | single, unmatched; uneven |
| Synonyms: | additional, alone, exceeding, individual, irregular, left, leftover, lone, lonely, over, over and above, remaining, singular, sole, solitary, spare, surplus, unconsumed, unitary, unpaired |
| Antonyms: | matched |
| Main Entry: | plus |
| Part of Speech: | adjective |
| Definition: | added, extra |
| Synonyms: | additional, augmented, boosted, enlarged, expanded, increased, positive, supplementary, surplus |
| Antonyms: | detrimental, minus, negative |
| Main Entry: | second |
| Part of Speech: | adjective |
| Definition: | next; subordinate |
| Synonyms: | additional, alternative, another, double, duplicate, extra, following, further, inferior, lesser, lower, next in order, other, place, repeated, reproduction, runner-up, secondary, subsequent, succeeding, supporting, twin, unimportant |
| Main Entry: | spare |
| Part of Speech: | adjective |
| Definition: | extra, reserve |
| Synonyms: | additional, backup, de trop, emergency, free, in excess, in reserve, in store, lagniappe, leftover, more than enough, odd, option, over, supererogatory, superfluous, supernumerary, surplus, unoccupied, unused, unwanted |
| Antonyms: | necessary |
| Main Entry: | substitute |
| Part of Speech: | adjective |
| Definition: | alternative |
| Synonyms: | acting, additional, alternate, another, artificial, backup, counterfeit, dummy, ersatz*, experimental, false, imitation, makeshift, mock, near, other, provisional, proxy, pseudo*, replacement, representative, reserve, second, sham, simulated, spurious, stopgap, substitutive, supplemental, supplementary, supposititious, surrogate, symbolic, temporary, tentative, vicarial, vicarious |