specialist vs designer

specialist and designer both are nouns.

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

As nouns, designer is a hyponym of specialist; that is, designer is a word with a more specific, narrower meaning than specialist:

specialist: an expert who is devoted to one occupation or branch of learning
designer: someone who specializes in graphic design

specialist (noun)	designer (noun)
an expert who is devoted to one occupation or branch of learning	someone who creates plans to be used in making something (such as buildings)
practices one branch of medicine	someone who designs clothing
	a person who specializes in interior design
	a person who devises plots or intrigues
	someone who specializes in graphic design