chromosomal aberration vs chromosomal anomaly

chromosomal aberration and chromosomal anomaly both are nouns.

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

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

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

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

chromosomal aberration (noun)	chromosomal anomaly (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