As a noun credit

is credit.

As a verb copublish is

to have credit as a publisher of (a work published by another).

As a noun publisher

is one who publishes, especially books.

As a verb copublish is

to have credit as a publisher of (a work published by another).

As an adverb jointly

is together, acting as one; collectively.

As a verb copublish is

to have credit as a publisher of (a work published by another).

In lang=en terms the difference between publish and copublish

is that publish is (intransitive): to write in a publication (usually as an academic) while copublish is to jointly with another publisher publish (a work).

As verbs the difference between publish and copublish

is that publish is (intransitive): to issue a medium (eg publication) while copublish is to have credit as a publisher of (a work published by another).

As a verb diagonalize

is (mathematics|transitive) to convert a square matrix into a diagonal matrix by multiplying it by a second matrix and its inverse.

As a noun diagonalizability is

the ability to be diagonalized.

As nouns the difference between database and prewrite

is that database is (computing) a collection of (usually) organized information in a regular structure, usually but not necessarily in a machine-readable format accessible by a computer while prewrite is (computing|database) a write operation that is buffered instead of being applied directly to the database.

As verbs the difference between database and prewrite

is that database is to enter data into a database while prewrite is to make a first draft of ideas and format for an essay, thesis, article, or book as a plan for the actual writing.

As a noun biomathematics

is (biology|mathematics) the application of mathematics to the study of biological systems and processes.

As an adjective biomathematical is

having to do with biomathematics.

As a noun group

is a number of things or persons being in some relation to one another.

As a verb group

is to put together to form a group.

As an adjective cocompact is

having a compact quotient space.

As a noun action

is something done so as to accomplish a purpose.

As an interjection action

is demanding or signifying the start of something, usually an act or scene of a theatric performance.

As a verb action

is (management) to act on a request etc, in order to put it into effect.

As an adjective cocompact is

having a compact quotient space.

As adjectives the difference between compact and cocompact

is that compact is closely packed, ie packing much in a small space while cocompact is having a compact quotient space.

As a noun compact

is an agreement or contract or compact can be a small, slim folding case, often featuring a mirror, powder and a powderpuff; that fits into a woman's purse or handbag, or that slips into ones pocket.

As a verb compact

is to make more dense; to compress.