lithosphere vs geosphere

lithosphere and geosphere both are nouns.

Word	Noun	Adjective	Verb	Adverb
lithosphere	Yes	No	No	No
geosphere	Yes	No	No	No

As nouns, lithosphere and geosphere are synonyms defined as:

lithosphere and geosphere: the solid part of the earth consisting of the crust and outer mantle

lithosphere (noun)	geosphere (noun)
the solid part of the earth consisting of the crust and outer mantle	the solid part of the earth consisting of the crust and outer mantle