speculate vs consider

speculate and consider both are verbs.

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

As verbs, consider is a hyponym of speculate; that is, consider is a word with a more specific, narrower meaning than speculate:

Other hyponyms of speculate include premeditate, theologise, theologize, introspect, bethink, cogitate, question, wonder, puzzle, study.

speculate (verb)	consider (verb)
reflect deeply on a subject	deem to be
to believe especially on uncertain or tentative grounds	take into consideration for exemplifying purposes
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	regard or treat with consideration, respect, and esteem
invest at a risk	judge or regard; look upon; judge
	show consideration for; take into account
	think about carefully; weigh
	give careful consideration to
	look at attentively
	look at carefully; study mentally