rickets vs rachitis

rickets and rachitis both are nouns.

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

As nouns, rickets and rachitis are synonyms defined as:

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

rickets (noun)	rachitis (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