arching vs arciform

arching and arciform both are adjectives.

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

As adjectives, arching and arciform are synonyms defined as:

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

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