In organic compound terms the difference between mek and toluene

is that mek is methyl ethyl ketone while toluene is a colourless, inflammable liquid hydrocarbon, methylbenzene, CH₃.C₆H₅, used as a solvent, in high-octane fuels and in the production of many chemical compounds.

As an initialism MEK

is methyl ethyl ketone.

As a noun toluene is

a colourless, inflammable liquid hydrocarbon, methylbenzene, CH₃.C₆H₅, used as a solvent, in high-octane fuels and in the production of many chemical compounds.

As adverbs the difference between amazingly and vastly

is that amazingly is in an amazing manner; in a way that causes amazement; wonderfully while vastly is greatly, in a vast manner.

As a noun generator

is one who, or that which, generates, begets, causes, or produces.

As a verb generating is

present participle of lang=en.

As adjectives the difference between keen and dynamic

is that keen is showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense while dynamic is changing; active; in motion.

As nouns the difference between keen and dynamic

is that keen is a prolonged wail for a deceased person while dynamic is a characteristic or manner of an interaction; a behavior.

As a verb keen

is (rare) to sharpen; to make cold or keen can be to utter a keen.

As a verb remember

is to recall from one's memory; to have an image in one's memory.

As a noun reflection is

the act of reflecting or the state of being reflected.

As nouns the difference between backend and vendor

is that backend is while vendor is a person or a company that vends or sells.

As nouns the difference between rainforests and forest

is that rainforests is while forest is a dense collection of trees covering a relatively large area larger than woods.

As a verb forest is

to cover an area with trees.

As a verb characterized

is (characterize).

As a noun differentiation is

differentiation (all senses).

As a verb characterized

is (characterize).

As an adjective virtuous is

full of virtue, having excellent moral character.

As nouns the difference between ghosts and spooks

is that ghosts is plural of ghost while spooks is plural of lang=en.

As verbs the difference between ghosts and spooks

is that ghosts is third-person singular of ghost while spooks is third-person singular of spook.