Is Interplanetary an Adjective?

INTERPLANETARY (adjective) definition and synonyms | Macmillan Dictionary.

What is interplanetary?

: existing, carried on, or operating between planets interplanetary dust an interplanetary flight interplanetary spacecraft.

What type of word is submarine?

a vessel that can be submerged and navigated under water, usually built for warfare and armed with torpedoes or guided missiles. something situated or living under the surface of the sea, as a plant or animal. verb (used without object), sub·ma·rined, sub·ma·rin·ing. ...