retrace vs speculate

retrace and speculate both are verbs.

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

As verbs, speculate is a hypernym of retrace; that is, speculate is a word with a broader meaning than retrace:

Other hypernyms of retrace include conjecture, hypothecate, hypothesise, hypothesize, suppose, theorise, theorize.

retrace (verb)	speculate (verb)
reassemble mentally	reflect deeply on a subject
to go back over again	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