buy up vs buy out

buy up and buy out both are verbs.

Word	Noun	Adjective	Verb	Adverb
buy up	No	No	Yes	No
buy out	No	No	Yes	No

As verbs, buy up and buy out are synonyms defined as:

buy up and buy out: take over ownership of; of corporations and companies

Other synonyms of buy up include take over.

buy up (verb)	buy out (verb)
take over ownership of; of corporations and companies	take over ownership of; of corporations and companies