We don't have synonyms for pinyons yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pinyon, pinions and pinons.
(n) :
Alternative spelling of piñon. [(uncountable, countable) Any of several species of North American pines in Pinus subsect. Cembroides that bear edible seeds (pine nuts), especially Pinus edulis; the nut pine.]
(n) :
Alternative spelling of piñon. [(uncountable, countable) Any of several species of North American pines in Pinus subsect. Cembroides that bear edible seeds (pine nuts), especially Pinus edulis; the nut pine.]