interface vs interfacial

interface is a noun but interfacial is not a noun.

Word	Noun	Adjective	Verb	Adverb
interface	Yes	No	No	No
interfacial	No	Yes	No	No

interface (noun)	interfacial (noun)
(chemistry) a surface forming a common boundary between two things (two objects or liquids or chemical phases)
(computer science) computer circuit consisting of the hardware and associated circuitry that links one device with another (especially a computer and a hard disk drive or other peripherals)
the overlap where two theories or phenomena affect each other or have links with each other
(computer science) a program that controls a display for the user (usually on a computer monitor) and that allows the user to interact with the system

interface (adjective)	interfacial (adjective)
	relating to or situated at an interface