thinker vs intellectual

thinker and intellectual both are nouns.

Word	Noun	Adjective	Verb	Adverb
thinker	Yes	No	No	No
intellectual	Yes	Yes	No	No

As nouns, intellectual is a hypernym of thinker; that is, intellectual is a word with a broader meaning than thinker:

Other hypernyms of thinker include intellect.

As nouns, intellectual is a hypernym of thinker; that is, intellectual is a word with a broader meaning than thinker:

thinker: someone who exercises the mind (usually in an effort to reach a decision)
intellectual: a person who uses the mind creatively

Other hypernyms of thinker include intellect.

thinker (noun)	intellectual (noun)
an important intellectual	a person who uses the mind creatively
someone who exercises the mind (usually in an effort to reach a decision)

thinker (adjective)	intellectual (adjective)
	appealing to or using the intellect
	involving intelligence rather than emotions or instinct
	of or associated with or requiring the use of the mind