What is another word for auxiliary?

Common synonyms for auxiliary include aide.

What is the plural of auxiliary?

The plural of auxiliary is auxiliaries.

/ɔɡˈzɪl.(jə).ɹi/noun, adjective4 syllables

Auxiliary means: furnishing added support.

noun, as in someone who acts as assistant

adjective, as in furnishing added support

accessory, adjunct, ancillary, adjuvant, appurtenant, supportive

adjective, as in functioning in a supporting capacity

also used for auxiliary

motorsailer

Includes material from Wiktionary, CC BY-SA 4.0.

adjective

furnishing added support“an ancillary pump”

functioning in a supporting capacity“the main library and its auxiliary branches”

noun

someone who acts as assistant

Definitions from the Open English WordNet, CC BY 4.0.

This is a subject question, and therefore you don't use an auxiliary verb.Ergulis
Since this is a subject question, you don't need an auxiliary verb.Ergulis
What auxiliary materials or machines can presenters use when making a presentation?unknown
Esperanto is the most popular auxiliary language ever invented.Adelpa
A billion international auxiliary languages is never enough.shekitten
There is very little difference between the auxiliary verbs.Ergulis
The future tense is formed with an auxiliary verb.shekitten
Interslavic is an example of a zonal auxiliary language.shekitten

Sentences from Tatoeba, CC BY 2.0 FR, credited to their authors.

as a noun