The Collaborative International Dictionary of English v.0.48:

Italicize \I*tal"i*cize\, v. t. & i. [imp. & p. p. Italicized;
   p. pr. & vb. n. Italicizing.]
   To print in Italic characters; to underline written letters
   or words with a single line; as, to Italicize a word;
   Italicizes too much.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "italicized":
   accented, accentuated, autograph, autographic, calligraphic,
   chirographic, cursive, decided, emphasized, emphatic, engrossed,
   flowing, forceful, forcible, graphic, graphoanalytic, graphologic,
   graphometric, holograph, holographic, in longhand, in red letters,
   in shorthand, in writing, inscribed, italic, longhand, manuscript,
   on paper, penciled, penned, pointed, positive, printed, punctuated,
   running, scriptorial, scriptural, shorthand, starred, stressed,
   stylographic, underlined, underscored, written