speculate vs retrace

speculate and retrace both are verbs.

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

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

Other hyponyms of speculate include construct, reconstruct, develop, explicate, formulate.

speculate (verb)	retrace (verb)
reflect deeply on a subject	reassemble mentally
to believe especially on uncertain or tentative grounds	to go back over again
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