takeover vs buyout

takeover and buyout both are nouns.

Word	Noun	Adjective	Verb	Adverb
takeover	Yes	No	No	No
buyout	Yes	No	No	No

As nouns, buyout is a hypernym of takeover; that is, buyout is a word with a broader meaning than takeover:

takeover: a change by sale or merger in the controlling interest of a corporation
buyout: acquisition of a company by purchasing a controlling percentage of its stock

takeover (noun)	buyout (noun)
a change by sale or merger in the controlling interest of a corporation	acquisition of a company by purchasing a controlling percentage of its stock
a sudden and decisive change of government illegally or by force