ultrasound vs ultrasonic

ultrasound is a noun but ultrasonic is not a noun.

Word	Noun	Adjective	Verb	Adverb
ultrasound	Yes	No	No	No
ultrasonic	No	Yes	No	No

ultrasound (noun)	ultrasonic (noun)
using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs
very high frequency sound; used in ultrasonography

ultrasound (adjective)	ultrasonic (adjective)
	having frequencies above those of audible sound