Syn-ŏn'y-mize, v. t.

v. t. [imp. & p. p. SYNONYMIZED; p. pr. & vb. n. SYNONYMIZING.] To express in different words of the same meaning; to express by means of synonyms.

This word “fortis” we may synonymize after all these fashions: stout, hardy, valiant, doughty, courageous, adventurous, brave, bold, daring, intrepid. Camden.