Auxiliary

Adjective

 * 1) Helping; giving assistance or support.
 * 2) Supplementary or subsidiary.
 * 3) Held in reserve for exceptional circumstances.
 * 4)  Of a ship, having both sails and an engine.
 * 5)  Relating to an auxiliary verb.

Noun

 * 1) A person or group that acts in an auxiliary manner.
 * 2) A sailing vessel equipped with an engine.
 * 3)  An auxiliary verb.
 * 4) A marching band colorguard.

Adjectives for Auxiliary
warlike; unexpected; disaffected; thundering.

Synonyms for Auxiliary

 * accessory
 * motorsailer
 * helper, confederate, ally, aid, assistant.

Antonyms for Auxiliary
adversary, opponent, opposer, competitor, rival.

Thesaurus
abetting; accessory; accident; accidental; acolyte; addendum; addition; additional; adjunct; adjutant; adjuvant; adscititious; adventitious; agent; aid; aide; aide-de-camp; aider; aiding; alter ego; ancillary; another; appendage; appurtenance; appurtenant; ascititious; assistance; assistant; assisting; attendant; auxiliary verb; backing; best man; casual; circumstantial; coadjutant; coadjutor; coadjutress; coadjutrix; collateral; complementary; contingency; contingent; contributory; copula; defective verb; deponent verb; deputy; executive officer; extra; farther; finite verb; fortuitous; fostering; fresh; further; girl Friday; happenstance; help; helper; helpful; helping; helpmate; helpmeet; impersonal verb; incidental; inessential; infinitive; instrumental; intransitive; intransitive verb; lieutenant; linking verb; man Friday; mere chance; ministerial; ministering; ministrant; modal auxiliary; more; neuter verb; new; nonessential; not-self; nurtural; nutricial; other; paranymph; paraprofessional; peripheral; plus; reserve; second; secondary; servant; serving; sideman; spare; subordinate; subservient; subsidiary; superadded; superaddition; superfluous; supernumerary; supervenient; supplement; supplemental; supplementary; support; supporter; supporting; supporting actor; supporting instrumentalist; supportive; surplus; transitive; tributary; ulterior; unessential; upholding; verb; verb phrase; verbal