sounding vs deepness

sounding and deepness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sounding	Yes	Yes	No	No
deepness	Yes	No	No	No

As nouns, deepness is a hypernym of sounding; that is, deepness is a word with a broader meaning than sounding:

Other hypernyms of sounding include depth.

sounding (noun)	deepness (noun)
the act of measuring depth of water (usually with a sounding line)	the quality of being physically deep
a measure of the depth of water taken with a sounding line	the extent downward or backward or inward
	a low pitch that is loud and voluminous
	the intellectual ability to penetrate deeply into ideas

sounding (adjective)	deepness (adjective)
making or having a sound as specified; used as a combining form
having volume or deepness
appearing to be as specified; usually used as combining forms