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synonymous

[si-non-uh-muh s] /sɪˈnɒn ə məs/
adjective
1.
having the character of synonyms or a synonym; equivalent in meaning; expressing or implying the same idea.
Origin
1600-1610
1600-10; < Medieval Latin synōnymus < Greek synṓnymos, equivalent to syn- syn- + -ōnym- -onym + -os adj. suffix; see -ous
Related forms
synonymously, adverb
synonymousness, noun
nonsynonymous, adjective
nonsynonymously, adverb
unsynonymous, adjective
unsynonymously, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for synonymousness

synonymous

/sɪˈnɒnɪməs/
adjective
1.
(often foll by with) being a synonym (of)
2.
(postpositive) foll by with. closely associated (with) or suggestive (of) his name was synonymous with greed
Derived Forms
synonymously, adverb
synonymousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for synonymousness
synonymous
c.1600, from M.L. synonymus, from Gk. synonymos (see synonym).
Online Etymology Dictionary, © 2010 Douglas Harper
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