As proper nouns the difference between raetia and rhaetian

is that raetia is (historical) a roman province bordered on the west by the (helvetii), on the east by noricum, on the north by vindelicia, on the west by cisalpine gaul and on south by italy, which occupied the region which is today central and eastern switzerland, southern bavaria, most of tirol and part of lombardy while rhaetian is rhaeto-romanic, a continuum of modern romance languages spoken in much the same region.

As a noun rhaetian is

a native or inhabitant of rhaetia in central and eastern switzerland.

As an adjective rhaetian is

pertaining to the culture or geography of raetia.

As nouns the difference between carburettor and airbox

is that carburettor is (au|nz|uk) a device in an internal combustion engine where fuel is vaporised and mixed with air prior to ignition while airbox is (informal) the chamber in a car or motorcycle engine that draws in air and distributes it to the carburettors.

As adverbs the difference between contrariwise and gainwise

is that contrariwise is in the contrary or opposite way, order, or direction while gainwise is in a contrary manner, contrariwise.

As an adjective gainwise is

contrary or gainwise can be of or relating to gain or increase.

Gainwise is a synonym of contrary.

As adjectives the difference between contrary and gainwise

is that contrary is opposite; in an opposite direction; in opposition; adverse while gainwise is contrary.

As adverbs the difference between contrary and gainwise

is that contrary is contrarily while gainwise is in a contrary manner, contrariwise.

As a noun contrary

is the opposite.

As a verb contrary

is to oppose; to frustrate.

Counter is a synonym of gainwise.

As adverbs the difference between counter and gainwise

is that counter is contrary, in opposition; in an opposite direction or counter can be in opposition; in an opposite direction; contrariwise while gainwise is in a contrary manner, contrariwise.

As adjectives the difference between counter and gainwise

is that counter is contrary; opposite; contrasted; opposed; adverse; antagonistic while gainwise is contrary or gainwise can be of or relating to gain or increase.

As a noun counter

is an object (now especially a small disc) used in counting or keeping count, or as a marker in games, etc or counter can be (nautical) the overhanging stern of a vessel above the waterline or counter can be (obsolete) an encounter.

As a verb counter

is to contradict, oppose.

Raetian is an alternative form of rhaetian.

As a noun rhaetian is

a native or inhabitant of rhaetia in central and eastern switzerland.

As an adjective rhaetian is

pertaining to the culture or geography of raetia.

As a proper noun rhaetian is

rhaeto-romanic, a continuum of modern romance languages spoken in much the same region.

As nouns the difference between repository and bookhouse

is that repository is a location for storage, often for safety or preservation while bookhouse is a repository for books, library; store of books.

As nouns the difference between books and bookhouse

is that books is while bookhouse is a repository for books, library; store of books.

As a verb books

is (book).

As nouns the difference between store and bookhouse

is that store is a place where items may be accumulated or routinely kept while bookhouse is a repository for books, library; store of books.

As a verb store

is   To keep (something) while not in use, generally in a place meant for that purpose.

Bookhouse is a synonym of bookstore.

As nouns the difference between bookstore and bookhouse

is that bookstore is a store where books are bought and sold while bookhouse is a repository for books, library; store of books.