chromosomal aberration vs chrosomal abnormality

chromosomal aberration and chrosomal abnormality both are nouns.

Word	Noun	Adjective	Verb	Adverb
chromosomal aberration	Yes	No	No	No
chrosomal abnormality	Yes	No	No	No

As nouns, chromosomal aberration and chrosomal abnormality are synonyms defined as:

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

Other synonyms of chromosomal aberration include chromosomal anomaly, chromosonal disorder.

chromosomal aberration (noun)	chrosomal abnormality (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