encrustation vs ornamentation

encrustation and ornamentation both are nouns.

Word	Noun	Adjective	Verb	Adverb
encrustation	Yes	No	No	No
ornamentation	Yes	No	No	No

As nouns, ornamentation is a hypernym of encrustation; that is, ornamentation is a word with a broader meaning than encrustation:

encrustation: a decorative coating of contrasting material that is applied to a surface as an inlay or overlay
ornamentation: something used to beautify

Other hypernyms of encrustation include decoration, ornament.

encrustation (noun)	ornamentation (noun)
a decorative coating of contrasting material that is applied to a surface as an inlay or overlay	the act of adding extraneous decorations to something
a hard outer layer that covers something	something used to beautify
the formation of a crust	the state of being ornamented