disguise vs mask

disguise and mask both are nouns.

Word	Noun	Adjective	Verb	Adverb
disguise	Yes	No	Yes	No
mask	Yes	No	Yes	No

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

disguise: any attire that modifies the appearance in order to conceal the wearer's identity
mask: a covering to disguise or conceal the face

Other hyponyms of disguise include fancy dress, masquerade, masquerade costume.

As verbs, disguise and mask are synonyms defined as:

As verbs, mask is a hyponym of disguise; that is, mask is a word with a more specific, narrower meaning than disguise:

Other hyponyms of disguise include cloak, dissemble, dissimulate, masquerade, camouflage.

disguise (noun)	mask (noun)
the act of concealing the identity of something by modifying its appearance	activity that tries to conceal something
any attire that modifies the appearance in order to conceal the wearer's identity	a covering to disguise or conceal the face
an outward semblance that misrepresents the true nature of something	a protective covering worn over the face
	a party of guests wearing costumes and masks

disguise (verb)	mask (verb)
make unrecognizable	put a mask on or cover with a mask
	shield from light
	cover with a sauce
	hide under a false appearance
	make unrecognizable