commit vs roll over

commit and roll over both are verbs.

Word	Noun	Adjective	Verb	Adverb
commit	No	No	Yes	No
roll over	No	No	Yes	No

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

commit: make an investment
roll over: re-invest (a previous investment) into a similar fund or security

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

commit (verb)	roll over (verb)
make a set of changes permanent	make a rolling motion or turn
transfer to another place so something can be kept or preserved	re-invest (a previous investment) into a similar fund or security
give entirely to a specific person, activity, or cause	negociate to repay a loan at a later date for an additional fee
confer a trust upon
cause to be admitted; of persons to an institution
make an investment
perform an act, usually with a negative connotation
engage in or perform