As an adjective available

is such as one may avail one’s self of; capable of being used for the accomplishment of a purpose.

As a verb acquire is

to get.

As nouns the difference between rotation and precession

is that rotation is the act of turning around a centre or an axis while precession is precedence.

As nouns the difference between groyne and breakwaters

is that groyne is a (usually wooden) structure that projects from a coastline to prevent erosion, longshore drift etc; a breakwater while breakwaters is .

As a noun profession

is a promise or vow made on entering a religious order.

As a verb course is

.

As a conjunction whereas

is .

As an adjective opposite is

located directly across from something else, or from each other.

As a noun opposite is

something opposite or contrary to another.

As an adverb opposite is

in an opposite position.

As a preposition opposite is

facing, or across from.

As nouns the difference between brougham and barouche

is that brougham is a four-wheeled horse-drawn carriage, designed in 1839 it had an open seat for the driver in front of the closed cabin for two or four passengers while barouche is (vehicles) four-wheeled horse-drawn carriage with collapsible half-hood, two double seats facing each other, and an outside seat for the driver.

As nouns the difference between messiah and prophets

is that messiah is the one who is ordained by God to lead the people of Israel, believed by Christians to be Jesus Christ while prophets is plural of lang=en.

As proper nouns the difference between messiah and prophets

is that messiah is the promised and expected savior or liberator of the Jewish people while Prophets is a division of the Old Testament, comprising the books of Joshua, Judges, Samuel, Kings, Isaiah, Jeremiah, Ezekiel, and the Twelve.

As adverbs the difference between voluntary and optionally

is that voluntary is (obsolete) voluntarily while optionally is in an optional manner not mandatorily.

As an adjective voluntary

is done, given, or acting of one's own free will.

As a noun voluntary

is (music) a short piece of music, often having improvisation, played on a solo instrument.

As verbs the difference between interpreter and transcribe

is that interpreter is (label) to translate while transcribe is to convert a representation of language, typically speech but also sign language, etc, to another representation the term now usually implies the conversion of speech to text by a human transcriptionist with the assistance of a computer for word processing and sometimes also for speech recognition, the process of a computer interpreting speech and converting it to text.

As a noun interpret

is interpreter.

As a verb transcribe is

to convert a representation of language, typically speech but also sign language, etc, to another representation the term now usually implies the conversion of speech to text by a human transcriptionist with the assistance of a computer for word processing and sometimes also for speech recognition, the process of a computer interpreting speech and converting it to text.