hypochondriac vs patient

hypochondriac and patient both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypochondriac	Yes	Yes	No	No
patient	Yes	Yes	No	No

As nouns, patient is a hypernym of hypochondriac; that is, patient is a word with a broader meaning than hypochondriac:

hypochondriac (noun)	patient (noun)
a patient with imaginary symptoms and ailments	the semantic role of an entity that is not the agent but is directly involved in or affected by the happening denoted by the verb in the clause
	a person who requires medical care

hypochondriac (adjective)	patient (adjective)
suffering from hypochondria	enduring trying circumstances with even temper or characterized by such endurance