trisomy 21 vs mongolism

trisomy 21 and mongolism both are nouns.

Word	Noun	Adjective	Verb	Adverb
trisomy 21	Yes	No	No	No
mongolism	Yes	No	No	No

As nouns, trisomy 21 and mongolism are synonyms defined as:

trisomy 21 and mongolism: a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation

Other synonyms of trisomy 21 include Down's syndrome, Down syndrome, mongolianism.

trisomy 21 (noun)	mongolism (noun)
a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation	a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation