degaussing vs demagnetization

degaussing and demagnetization both are nouns.

Word	Noun	Adjective	Verb	Adverb
degaussing	Yes	No	No	No
demagnetization	Yes	No	No	No

As nouns, demagnetization is a hypernym of degaussing; that is, demagnetization is a word with a broader meaning than degaussing:

degaussing: the process of making a (steel) ship's hull nonmagnetic by producing an opposing magnetic field
demagnetization: the process of removing magnetization

Other hypernyms of degaussing include demagnetisation.

degaussing (noun)	demagnetization (noun)
the process of making a (steel) ship's hull nonmagnetic by producing an opposing magnetic field	the process of removing magnetization