Subterrane(n.) A cave or room under ground.
Subterraneal(a.) Subterranean.
Subterraneous(a.) Being or lying under the surface of the earth; situated within the earth, or under ground; as, subterranean springs; a subterraneous passage.
Subterranity(n.) A place under ground; a subterrany.

Words within subterraneously

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