momentous

As adjectives the difference between momentous and pivotal

is that momentous is outstanding in importance, of great consequence while pivotal is of, relating to, or being a pivot.

As adjectives the difference between momentous and unusual

is that momentous is outstanding in importance, of great consequence while unusual is unlike what is expected; differing in some way from the norm.

As adjectives the difference between momental and momentous

is that momental is (obsolete) lasting only for a moment; brief while momentous is outstanding in importance, of great consequence.

As adjectives the difference between salient and momentous

is that salient is worthy of note; pertinent or relevant while momentous is outstanding in importance, of great consequence.

As a noun salient

is (military) an outwardly projecting part of a fortification, trench system, or line of defense.

As adjectives the difference between momentous and false

is that momentous is outstanding in importance, of great consequence while false is (label) one of two states of a boolean variable; logic.

As adjectives the difference between momentous and undefined

is that momentous is outstanding in importance, of great consequence while undefined is lacking a definition or value.

As adjectives the difference between momentous and seminal

is that momentous is outstanding in importance, of great consequence while seminal is seminal.

As an adjective momentous

is outstanding in importance, of great consequence.

As a noun motivation is

(label) motivation.

Ponderous is a related term of momentous.

As adjectives the difference between ponderous and momentous

is that ponderous is heavy, massive, weighty while momentous is outstanding in importance, of great consequence.