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Synonyms for life-changing

adj altering a person's life in a substantial way

Antonyms for life-changing

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

transformative

adjective. power to change dramatically
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.