gut

As a verb get

is (label) to obtain; to acquire.

As a noun get

is offspring or get can be (british|regional) a git or get can be (judaism) a jewish writ of divorce.

As an initialism gut is

grand unification theory.

As a proper noun gun

is .

As an initialism gut is

grand unification theory.

As a noun hut

is hat or hut can be guard.

As an initialism gut is

grand unification theory.

As nouns the difference between but and gut

is that but is an instance or example of using the word "but" while gut is the alimentary canal, especially the intestine.

As a preposition but

is outside of.

As an adverb but

is merely, only.

As a conjunction but

is except (for), excluding. Preceded by a negation.

As a verb gut is

to eviscerate.

As an adjective gut is

made of gut, e.g., a violin with gut strings

As an initialism GUT is

grand unification theory.