mushroom: mushrooms and related fleshy fungi (including toadstools, puffballs, morels, coral fungi, etc.)
agaric: a saprophytic fungus of the order Agaricales having an umbrellalike cap with gills on the underside
monera: prokaryotic bacteria and blue-green algae and various primitive pathogens; because of lack of consensus on how to divide the organisms into phyla informal names are used for the major divisions