speculator vs speculate

speculator is a noun but speculate is not a noun.

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

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

speculator (verb)	speculate (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