As nouns the difference between endgame and midgame

is that endgame is the final stage of an extended process or course of events while midgame is the middle part of a game, between the opening and the endgame.

As an adjective midgame is

in the middle of a game.

As an adverb midgame is

in the middle of a game.

As adjectives the difference between multifold and multiplicate

is that multifold is many; very diverse; manifold while multiplicate is consisting of many, or of more than one; multiple; multifold.

As a noun multiplicate is

a multiple; a result of multiplication.

As a verb multiplicate is

to make multiple copies of.

As nouns the difference between multiplication and multiplicate

is that multiplication is (uncountable|mathematics) the process of computing the sum of a number with itself a specified number of times, or any other analogous binary operation that combines other mathematical objects