SYNONYMOUS
synonymous
(adjective) (of words) meaning the same or nearly the same
Source: WordNet® 3.1
Etymology
Adjective
synonymous (not comparable)
(construed with with, narrower sense) having an identical meaning
(construed with with, broader sense) having a similar meaning
(construed with with) of, or being a synonym
(genetics, of a SNP) Such that both its forms yield the same sequenced protein.
Antonyms
• antonymous
• nonsynonymous
• (genetics): nonsynonymous
Source: Wiktionary
Syn*on"y*mous, a. Etym: [Gr. Syn-, and Name.]
Definition: Having the character of a synonym; expressing the same thing;
conveying the same, or approximately the same, idea.
– Syn*on"y*mous*ly, adv.
These words consist of two propositions, which are not distinct in
sense, but one and the same thing variously expressed; for wisdom and
understanding are synonymous words here. Tillotson.
Syn.
– Identical; interchangeable.
– Synonymous, Identical. If no words are synonymous except those
which are identical in use and meaning, so that the one can in all
cases be substituted for the other, we have scarcely ten such words
in our language. But the term more properly denotes that the words in
question approach so near to each other, that, in many or most cases,
they can be used interchangeably. 1. Words may thus coincide in
certain connections, and so be interchanged, when they can not be
interchanged in other connections; thus we may speak either strength
of mind or of force of mind, but we say the force (not strength) of
gravitation. 2. Two words may differ slightly, but this difference
may be unimportant to the speaker's object, so that he may freely
interchange them; thus it makes but little difference, in most cases,
whether we speak of a man's having secured his object or having
attained his object. For these and other causes we have numerous
words which may, in many cases or connections, be used
interchangeably, and these are properly called synonyms. Synonymous
words "are words which, with great and essential resemblances of
meaning, have, at the same time, small, subordinate, and partial
differences, -- these differences being such as either originally and
on the ground of their etymology inhered in them; or differences
which they have by usage acquired in the eyes of all; or such as,
though nearly latent now, they are capable of receiving at the hands
of wise and discreet masters of the tongue. Synonyms are words of
like significance in the main, but with a certain unlikeness as
well." Trench.
Source: Webster’s Unabridged Dictionary 1913 Edition