arching vs arched

arching and arched both are adjectives.

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

As adjectives, arching and arched are synonyms defined as:

Other synonyms of arching include arced, arciform, arcuate, bowed.

arching (adjective)	arched (adjective)
forming or resembling an arch	constructed with or in the form of an arch or arches
	forming or resembling an arch