architecture vs arching

architecture is a noun but arching is not a noun.

Word	Noun	Adjective	Verb	Adverb
architecture	Yes	No	No	No
arching	No	Yes	No	No

architecture (noun)	arching (noun)
the profession of designing buildings and environments with consideration for their esthetic effect
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

architecture (adjective)	arching (adjective)
	forming or resembling an arch