We don't have synonyms for rolling mills yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are rolling mill, rolling hills and rolling-mill.
(n) :
A machine or group of machines for rolling metal (especially steel) into semifinished or finished shapes, such as beams, plate, or sheet; the entire associated plant (e.g., machinery, buildings, railyards).
(n) :
A machine or group of machines for rolling metal (especially steel) into semifinished or finished shapes, such as beams, plate, or sheet; the entire associated plant (e.g., machinery, buildings, railyards).