meditate vs speculate

meditate and speculate both are verbs.

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

As verbs, meditate and speculate are synonyms defined as:

Other synonyms of meditate include chew over, contemplate, excogitate, mull, mull over, muse, ponder, reflect, ruminate, think over.

meditate (verb)	speculate (verb)
reflect deeply on a subject	reflect deeply on a subject
think intently and at length, as for spiritual purposes	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