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on spur of moment

ADVERB

suddenly

Synonyms

STRONGEST

abruptly all of a sudden quickly swiftly

STRONG

short

WEAK

aback all at once asudden forthwith sudden unanticipatedly unaware unawares without warning

Antonyms

WEAK

expectedly slowly

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.