We don't have synonyms for stooked yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are stooped, spooked and stocked.
(n) :
(specifically) A group of six or eight sheaves of grain stacked to dry vertically in a rectangular arrangement at harvest time, largely obsolete since the advent of combine harvesters and powered grain driers (mid 20th century).
(n) :
(specifically) A group of six or eight sheaves of grain stacked to dry vertically in a rectangular arrangement at harvest time, largely obsolete since the advent of combine harvesters and powered grain driers (mid 20th century).