bitumastic vs coating

bitumastic and coating both are nouns.

Word	Noun	Adjective	Verb	Adverb
bitumastic	Yes	No	No	No
coating	Yes	No	No	No

As nouns, coating is a hypernym of bitumastic; that is, coating is a word with a broader meaning than bitumastic:

bitumastic: a protective coating of asphalt and filter used on structural metals that are exposed to weathering
coating: a thin layer covering something

Other hypernyms of bitumastic include coat.

bitumastic (noun)	coating (noun)
a protective coating of asphalt and filter used on structural metals that are exposed to weathering	the work of applying something
	a thin layer covering something
	a heavy fabric suitable for coats
	a decorative texture or appearance of a surface (or the substance that gives it that appearance)