Italicize

(v. t. & i.) To print in Italic characters; to underline written letters or words with a single line; as, to Italicize a word; Italicizes too much.

Thesaurus Entries

accent, accentuate, belabor, dwell on, emphasize, feature, give emphasis to, harp on, highlight, overaccentuate, overemphasize, overstress, place emphasis on, play up, point up, punctuate, rub in, spotlight, star, stress, underline, underscore