earth vs terrestrial planet

earth and terrestrial planet both are nouns.

Word	Noun	Adjective	Verb	Adverb
earth	Yes	No	Yes	No
terrestrial planet	Yes	No	No	No

earth (noun)	terrestrial planet (noun)
a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage)	a planet having a compact rocky surface like the Earth's; the four innermost planets in the solar system
the concerns of this life as distinguished from heaven and the afterlife
the abode of mortals (as contrasted with Heaven or Hell)
the solid part of the earth's surface
the 3rd planet from the sun; the planet we live on
the loose soft material that makes up a large part of the land surface
once thought to be one of four elements composing the universe (Empedocles), associated with the humour black bile

earth (verb)	terrestrial planet (verb)
connect to the earth
hide in the earth like a hunted animal