speculator vs thinker

speculator and thinker both are nouns.

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

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

speculator: someone who makes conjectures without knowing the facts
thinker: someone who exercises the mind (usually in an effort to reach a decision)

speculator (noun)	thinker (noun)
someone who risks losses for the possibility of considerable gains	an important intellectual
someone who makes conjectures without knowing the facts	someone who exercises the mind (usually in an effort to reach a decision)