Ostentation :: Ostentation (n.) The act of ostentating or of making an ambitious display; unnecessary show; pretentious parade; -- usually in a detractive sense.
Sustentation :: Sustentation (n.) The act of sustaining, or the state of being sustained; preservation from falling; support; sustenance; maintenance..
Sustentative :: Sustentation (n.) The aggregate of the functions by which a living organism is maintained in a normal condition of weight and growth.