Synonyms of the word

epoch-making

• adj. Constituting an epoch; opening a new era; introducing new conceptions or a new method in the treatment…

epochal

• adj. of or pertaining to an epoch.
• adj. highly important or significant; monumentous, epoch-making.

important

• adj. Having relevant and crucial value.

significant

• adj. Signifying something; carrying meaning.
• adj. Having a covert or hidden meaning.
• adj. Having a noticeable or major effect; notable.
• adj. Reasonably large in number or amount.
• adj. (statistics) Having a low probability of occurring by chance (for example, having high correlation and…
• n. That which has significance; a sign; a token; a symbol.