rheumatoid arthritis vs virus

rheumatoid arthritis and virus both are nouns.

Word	Noun	Adjective	Verb	Adverb
rheumatoid arthritis	Yes	No	No	No
virus	Yes	No	No	No

rheumatoid arthritis (noun)	virus (noun)
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	(virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein
	a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer
	a harmful or corrupting agency