Thesaurus.com
Dictionary.com
Definitions

transformative

[trans-fawr-muh-tiv] / trænsˈfɔr mə tɪv /
ADJECTIVE
power to change dramatically
Synonyms
STRONGEST
life-changing transformational
STRONG
metamorphic
WEAK
born-again cathartic reframing transmuting
Antonyms
STRONG
uneventful
WEAK
everyday ordinary

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