Word Type

Adverb

Adverb

Noun

Conjunction

The word "once" can be used as adverb, adverb, noun and conjunction.

Word Relationships

Opposites (Antonyms)

lot many many times times twice

Capable Of

suscribe to magazine good housekeeping

Coordinate Terms

never often seldom thrice tomorrow twice yesterday

Derived Terms

Christmas comes but once a year Once Brewed don't spend it all at once fool me once for this once once a man, twice a boy once a man, twice a child once a woman, twice a child once on a time once-in-a-generation once-in-a-lifetime once-off once-over-lightly onceness oncer

Distinct From

many twice

Etymologically Related To

one

Has Part

mushrooms mario can eat one

Context

frequency mathematics temporal location

Type Of (IsA)

dead stay dead done can eat vegetables

Related Terms

at once for once for once and for all frequency measure twice and cut once not even once once again once and again once and away once and for all once for all once in a blue moon once in a purple moon once in a way once in a while once more once more into the breach once or twice once over once removed once upon a time once you go black once-over write once you only go around once you only go around once in life you only live once

Related Terms

after almost amount at once before before twice beginning do fairy fairy tales formerly happened happened one happening lifetime lt lt twice movie movie title negotiation number number almost once again once and for all once in blue moon once in while once removed once upon time one period single single time singularity something soon story story beginning tales time title twice upon upon time when you do

Similar Terms

twice yesterday

Synonym Network

at one time in one case one time

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.