synonymous
adj.
c.1600, of words, "denoting the same idea," from Medieval Latin synonymus, from Greek synonymos, from synonymon (see synonym). Related: Synonymously.
〔李〕[syn-=together共；onym=name名；-ous a.=having有⋯的⇒“having a name together with sth. else与它物有同一名字的”→] a.having the same or nearly the same meaning同义的