architecture vs corbel step

architecture and corbel step both are nouns.

Word	Noun	Adjective	Verb	Adverb
architecture	Yes	No	No	No
corbel step	Yes	No	No	No

architecture (noun)	corbel step (noun)
the profession of designing buildings and environments with consideration for their esthetic effect	(architecture) a step on the top of a gable wall
an architectural product or work
(computer science) the structure and organization of a computer's hardware or system software
the discipline dealing with the principles of design and construction and ornamentation of fine buildings