trisomy vs chromosomal anomaly

trisomy and chromosomal anomaly both are nouns.

Word	Noun	Adjective	Verb	Adverb
trisomy	Yes	No	No	No
chromosomal anomaly	Yes	No	No	No

As nouns, chromosomal anomaly is a hypernym of trisomy; that is, chromosomal anomaly is a word with a broader meaning than trisomy:

trisomy: chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
chromosomal anomaly: any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities

Other hypernyms of trisomy include chromosomal aberration, chromosonal disorder, chrosomal abnormality.

trisomy (noun)	chromosomal anomaly (noun)
chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell	any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities