rachitis vs rickets

rachitis and rickets both are nouns.

Word	Noun	Adjective	Verb	Adverb
rachitis	Yes	No	No	No
rickets	Yes	No	No	No

As nouns, rachitis and rickets are synonyms defined as:

rachitis and rickets: childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus

rachitis (noun)	rickets (noun)
childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus	childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus
inflammation of the vertebral column