osteosclerosis congenita vs achondroplasty

osteosclerosis congenita and achondroplasty both are nouns.

Word	Noun	Adjective	Verb	Adverb
osteosclerosis congenita	Yes	No	No	No
achondroplasty	Yes	No	No	No

As nouns, osteosclerosis congenita and achondroplasty are synonyms defined as:

osteosclerosis congenita and achondroplasty: an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism

Other synonyms of osteosclerosis congenita include achondroplasia, chondrodystrophy.

osteosclerosis congenita (noun)	achondroplasty (noun)
an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism	an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism