nationalize

Concise Oxford English Dictionary © 2008 Oxford University Press:
nationalize /ˈnaʃnəlʌɪz/ (or nationalise)

▶verb

• 1 transfer (a major branch of industry or commerce) from private to state ownership or control.

• 2 make distinctively national.

• 3 (usu. as adj. nationalized) archaic make (a foreigner) naturalized.

– derivatives
nationalization noun,
nationalizer noun.