momentous
- adjective (adj)
Meaning: important serious
Synonyms:
big
chips are down
consequential
considerable
critical
crucial
decisive
earth-shaking
earth-shattering
epochal
eventful
far-reaching
fateful
grave
heavy
heavy number
historic
material
meaningful
memorable
notable
of moment
outstanding
pivotal
significant
substantial
vital
weighty
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.