mask of pregnancy vs chloasma

mask of pregnancy and chloasma both are nouns.

Word	Noun	Adjective	Verb	Adverb
mask of pregnancy	Yes	No	No	No
chloasma	Yes	No	No	No

As nouns, mask of pregnancy and chloasma are synonyms defined as:

mask of pregnancy and chloasma: a tan discoloration of a woman's face that is associated with pregnancy or with the use of oral contraceptives

Other synonyms of mask of pregnancy include melasma.

mask of pregnancy (noun)	chloasma (noun)
a tan discoloration of a woman's face that is associated with pregnancy or with the use of oral contraceptives	a tan discoloration of a woman's face that is associated with pregnancy or with the use of oral contraceptives