We don't have synonyms for open-field yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are open field and penfield.
(adj) :
(American football) Of a player, capable of obtaining yardage in a broken field.
(adj) :
(agriculture, historical) Of a farming system, in which each manor or village had two or three large fields divided into narrow strips of land individually cultivated by tenants or serfs.
(adj) :
(American football) Of a player, capable of obtaining yardage in a broken field.
(adj) :
(agriculture, historical) Of a farming system, in which each manor or village had two or three large fields divided into narrow strips of land individually cultivated by tenants or serfs.