echo sounding vs localization

echo sounding and localization both are nouns.

Word	Noun	Adjective	Verb	Adverb
echo sounding	Yes	No	No	No
localization	Yes	No	No	No

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

echo sounding: determining the location of something by measuring the time it takes for an echo to return from it
localization: a determination of the place where something is

Other hypernyms of echo sounding include fix, localisation, locating, location.

echo sounding (noun)	localization (noun)
determining the location of something by measuring the time it takes for an echo to return from it	a determination of the place where something is
	(physiology) the principle that specific functions have relatively circumscribed locations in some particular part or organ of the body