subterrestrial

As adjectives the difference between subterranean and subterrestrial

is that subterranean is below ground, under the earth, underground while subterrestrial is under the earth; subterranean.

As adjectives the difference between intraterrestrial and subterrestrial

is that intraterrestrial is (microbiology) living deep underground while subterrestrial is under the earth; subterranean.

As a noun intraterrestrial

is (microbiology) a which lives deep underground.

As adjectives the difference between extraterrestrial and subterrestrial

is that extraterrestrial is originating from outside of the Earth's atmosphere, from space, or from another planet; alien to Earth or its environment while subterrestrial is under the earth; subterranean.

As a noun extraterrestrial

is a being originating from outside of the Earth's atmosphere, from space, or from another planet; an alien.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective subterrestrial is

under the earth; subterranean.