melasma vs chloasma

melasma and chloasma both are nouns.

Word	Noun	Adjective	Verb	Adverb
melasma	Yes	No	No	No
chloasma	Yes	No	No	No

As nouns, melasma and chloasma are synonyms defined as:

melasma 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 melasma include mask of pregnancy.

melasma (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