temporaneous

As adjectives the difference between temporaneous and extra

is that temporaneous is temporary while extra is beyond what is due, usual, expected, or necessary; extraneous; additional; supernumerary.

As an adverb extra is

to an extraordinary degree.

As a noun extra is

a run scored without the ball having hit the striker's bat - a wide, bye, leg bye or no ball; in Australia referred to as a sundry.

As a noun terms

is .

As an adjective temporaneous is

(obsolete) temporary.