We don't have synonyms for friess yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are fries, fress and riess.
(n) :
(cooking, chiefly Canada, US, Philippines) Ellipsis of french fries. [(chiefly Canada, US, Philippines) Strips of deep-fried potatoes that have been frenched (cut into strips).]
(n) :
(cooking, chiefly Canada, US, Philippines) Ellipsis of french fries. [(chiefly Canada, US, Philippines) Strips of deep-fried potatoes that have been frenched (cut into strips).]