Open English Wordnet
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Adverbs
(r)
at a time
,
at once
,
at one time
simultaneously
“he took three cookies at a time”
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(r)
once
,
formerly
,
at one time
,
erstwhile
,
erst
at a previous time
“at one time he loved her”
,
“her erstwhile writing”
,
“she was a dancer once”
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