chromosomal anomaly vs chromosomal aberration

chromosomal anomaly and chromosomal aberration both are nouns.

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

As nouns, chromosomal anomaly and chromosomal aberration are synonyms defined as:

chromosomal anomaly and chromosomal aberration: any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities

Other synonyms of chromosomal anomaly include chromosonal disorder, chrosomal abnormality.

chromosomal anomaly (noun)	chromosomal aberration (noun)
any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities	any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities