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general::
a great change
transformation
noun [ uncountable and countable ] a change in which something or someone becomes completely different:
• There has been a complete transformation in his attitude since he became a father. • her transformation from shy local girl to famous movie actress
revolution
noun [ countable ] a complete change in ways of thinking or working:
• The 1970s saw the beginnings of a new technological revolution. • Einstein’s General Theory of Relativity started a revolution in scientific thinking.
shake-up
noun [ countable ] a situation in which a lot of changes are very quickly made in a system or organization in order to make it more effective:
• The department has not performed well and is badly in need of a shake-up. • The Administration is planning a thorough shake-up of the welfare system.
U-turn
noun [ countable ] a complete change in the plans of a government or political party so that it decides to do the opposite of what it originally said it would do:
• The government was forced to do a U-turn after angry protests about their taxation policy.
Longman-Thesaurus
3
general::
noun ADJ. amazing, complete, dramatic, fundamental, major, miraculous, profound, radical, remarkable, revolutionary, startling, total | subtle | gradual | immediate, instant, rapid, sudden | cultural, economic, historical, intellectual, physical, political, social, structural VERB + TRANSFORMATION undergo The way we work has undergone a radical transformation in the past decade. | make He was struggling to make the transformation from single man to responsible husband. | achieve, bring about, carry out, cause, effect, lead to Going to college brought about a dramatic transformation in her outlook. | accelerate | complete TRANSFORMATION + VERB begin | come about, occur, take place A startling cultural transformation occurred in post-war Britain. TRANSFORMATION + NOUN process PREP. ~ from The transformation from disused docks into city-centre cultural venue took three years. | ~ in This decision marked a fundamental transformation in policy. | ~ into Japan's transformation into an economic superpower | ~ to Russia's transformation to a market economy
Oxford Collocations Dictionary