take over vs takeover

take over is not a noun while takeover is a noun.

Word	Noun	Adjective	Verb	Adverb
take over	No	No	Yes	No
takeover	Yes	No	No	No

take over (noun)	takeover (noun)
	a change by sale or merger in the controlling interest of a corporation
	a sudden and decisive change of government illegally or by force

take over (verb)	takeover (verb)
take up, as of debts or payments
take over ownership of; of corporations and companies
take up and practice as one's own
take on as one's own the expenses or debts of another person
seize and take control without authority and possibly with force; take as one's right or possession
free someone temporarily from his or her obligations
take on titles, offices, duties, responsibilities
do over