Synonyms for Take over:

n.

handle, move in on, run with it, take charge (of), see to, hijack, take the lead. start on, lead, get around to, set about, begin, get down to, dive in, go to. overthrow. send, transport, move.

v.

assume (verb)
begin, set about, arrogate.
command (verb)
conquer, lead.
cover (verb)
relieve.
manage (verb)
handle.
possession (verb)
assume, arrogate, usurp, seize.
seize (verb)
capture.

Other synonyms:

see to, get around to, start on, dive in. move in on, set about, get down to, go to, hijack. begin. handle. move. steal
appropriate.