italicize

is likely misspelled.

has no English definition.

As a verb italicize

is to put into italics.

In figuratively|lang=en terms the difference between italicize and underline

is that italicize is (figuratively) to emphasize while underline is (figuratively) to emphasise or stress something.

As verbs the difference between italicize and underline

is that italicize is (typography) to put into italics while underline is to draw a line underneath something, especially to add emphasis; to underscore.

As a noun underline is

a line placed underneath a piece of text in order to provide emphasis or (in electronic documents) to indicate that it should be viewed in italics or that it acts as a hyperlink.

As an adjective underline is

passing under a railway line.

As verbs the difference between italicize and italicized

is that italicize is to put into italics while italicized is past tense of italicize.

As a noun taxonomy

is the science or the technique used to make a classification.

As a verb italicize is

(typography) to put into italics.

As a verb italicize

is (typography) to put into italics.

As an adjective nonitalicized is

not italicized.

As a verb italicize

is to put into italics.

As an adjective unitalicized is

not italicized.