classifier vs thinker

classifier and thinker both are nouns.

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

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

classifier: a person who creates classifications
thinker: someone who exercises the mind (usually in an effort to reach a decision)

classifier (noun)	thinker (noun)
an algorithm that implements classification.	an important intellectual
a word or morpheme used in some languages in certain contexts (such as counting) to indicate the semantic class to which the counted item belongs	someone who exercises the mind (usually in an effort to reach a decision)
a person who creates classifications