1) Accent 2) Accentuate 3) Emphasize 4) Give extra weight to 5) Punctuate 6) Stress 7) Stress, underline 8) Underline 9) Underscore 1) Accentuate 2) Emphasize 3) Stress 4) Topicalize 
emphasize, emphasise (usually UK) 1. To show or to state that something is particularly important or worth giving attention to; to give extra weight to (a communication): 'People use italics or capitals to emphasize a word in a piece of writing.' 2. To make something more obvious. 3. To stress or to single out as important.