As food: Mushroom is (فطر) As verb (just like in English mushroom also means to spread, grow, or develop quickly): Then it means (نما بسرعة كالفطر. تكاثر. انتشر)

فطر وايضا نطلق عليه مشروم

as food we call it " عــيـــش الغـــراب "

In standard Arabic:fetr=فطر in dialects:mushroom=مشروم