rheumatism vs rheumatic

rheumatism and rheumatic both are nouns.

Word	Noun	Adjective	Verb	Adverb
rheumatism	Yes	No	No	No
rheumatic	Yes	Yes	No	No

rheumatism (noun)	rheumatic (noun)
any painful disorder of the joints or muscles or connective tissues	a person suffering with rheumatism
a chronic autoimmune disease with inflammation of the joints and marked deformities; something (possibly a virus) triggers an attack on the synovium by the immune system, which releases cytokines that stimulate an inflammatory reaction that can lead to the destruction of all components of the joint

rheumatism (adjective)	rheumatic (adjective)
	of or pertaining to arthritis