rheumatic

nouns

a person suffering with rheumatism
rheumatic
is a type of (narrower)
a person suffering from an illness
diseased person, sick person, sufferer

adjectives

of or pertaining to arthritis
"my creaky old joints"; "rheumy with age and grief"
arthritic, creaky, rheumatic, rheumatoid, rheumy
is derived from
rheumatism
is derived from
rheumatism