speculate vs speculator

speculate is not a noun while speculator is a noun.

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

speculate (noun)	speculator (noun)
	someone who risks losses for the possibility of considerable gains
	someone who makes conjectures without knowing the facts

speculate (verb)	speculator (verb)
reflect deeply on a subject
to believe especially on uncertain or tentative grounds
talk over conjecturally, or review in an idle or casual way and with an element of doubt or without sufficient reason to reach a conclusion
invest at a risk