orthopaedist vs specialist

orthopaedist and specialist both are nouns.

Word	Noun	Adjective	Verb	Adverb
orthopaedist	Yes	No	No	No
specialist	Yes	No	No	No

As nouns, specialist is a hypernym of orthopaedist; that is, specialist is a word with a broader meaning than orthopaedist:

orthopaedist: a specialist in correcting deformities of the skeletal system (especially in children)
specialist: practices one branch of medicine

Other hypernyms of orthopaedist include medical specialist.

orthopaedist (noun)	specialist (noun)
a specialist in correcting deformities of the skeletal system (especially in children)	an expert who is devoted to one occupation or branch of learning
	practices one branch of medicine