We don't have synonyms for line feed yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are live feed, linefeed and pine weed.
°On a typewriter, the action of the carriage roller to push the page up one, two or one and a half lines (as set elsewhere) when executing a carriage return.
°On a typewriter, the action of the carriage roller to push the page up one, two or one and a half lines (as set elsewhere) when executing a carriage return.