momentous
adjective
[ mə(ʊ)ˈmɛntəs ]
• of great importance or significance, especially in having a bearing on future events.
• "a period of momentous changes in East–West relations"
Similar:
important,
significant,
epoch-making,
historic,
apocalyptic,
headline,
fateful,
portentous,
critical,
crucial,
vital,
life-and-death,
decisive,
pivotal,
serious,
grave,
weighty,
consequential,
big,
great,
far-reaching,
life-changing,
of importance,
of moment,
of significance,
of consequence,
earth-shaking,
earth-shattering,
world-shaking,
world-shattering,