puffball: any of various fungi of the family Lycoperdaceae whose round fruiting body discharges a cloud of spores when mature
fungus: an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia
bait and switch: a deceptive way of selling that involves advertising a product at a very low price in order to attract customers who are then persuaded to switch to a more expensive product