cambodian — of or relating to Cambodia or its inhabitants
collodion — a colourless or yellow syrupy liquid that consists of a solution of pyroxylin in ether and alcohol: used in medicine and in the manufacture of photographic plates, lacquers, etc
custodian — The custodian of an official building, a companies' assets, or something else valuable is the person who is officially in charge of it.
Four-or-more syllable rhymes
nickelodeon — an early motion-picture theater where a film or a variety show could be seen, usually for the admission price of a nickel.