domino vs half mask

domino and half mask both are nouns.

Word	Noun	Adjective	Verb	Adverb
domino	Yes	No	No	No
half mask	Yes	No	No	No

As nouns, domino and half mask are synonyms defined as:

domino and half mask: a mask covering the upper part of the face but with holes for the eyes

Other synonyms of domino include eye mask.

domino (noun)	half mask (noun)
a small rectangular block used in playing the game of dominoes; the face of each block has two equal areas that can bear 0 to 6 dots	a mask covering the upper part of the face but with holes for the eyes
a mask covering the upper part of the face but with holes for the eyes
a loose hooded cloak worn with a half mask as part of a masquerade costume