depth vs sounding

depth and sounding both are nouns.

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

As nouns, sounding is a hyponym of depth; that is, sounding is a word with a more specific, narrower meaning than depth:

Other hyponyms of depth include deepness, profoundness, profundity, draft, draught, penetration, shallowness.

depth (noun)	sounding (noun)
the extent downward or backward or inward	the act of measuring depth of water (usually with a sounding line)
degree of psychological or intellectual profundity	a measure of the depth of water taken with a sounding line
the attribute or quality of being deep, strong, or intense
the intellectual ability to penetrate deeply into ideas
(usually plural) a low moral state

depth (adjective)	sounding (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