commit vs speculate

commit and speculate both are verbs.

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

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

Other hyponyms of commit include fund, roll over, shelter, tie up, job, buy into.

commit (verb)	speculate (verb)
make a set of changes permanent	reflect deeply on a subject
transfer to another place so something can be kept or preserved	to believe especially on uncertain or tentative grounds
give entirely to a specific person, activity, or cause	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
confer a trust upon	invest at a risk
cause to be admitted; of persons to an institution
make an investment
perform an act, usually with a negative connotation
engage in or perform