pillow fort → μαξιλαρόσπιτο, φρούριο με μαξιλάρια, μαξιλαροφρούριο, μαξιλαροκατασκευή
blanket fort, couch fort, sheet fort, den
An inhabitable structure built from pillows, blankets, bed sheets, and sofa cushions, usually as part of a child's play.
pillow fort - Wiktionary