Home › Words › S › subterraneousnesssubterraneousnesssubterraneousness means the state or condition of being subterraneous.Among words judged in Lexicurio's Arena, subterraneousness ranks #42,031 of 42,747 for Qualifying.EtymologyFrom subterraneous + -ness.nounThe state or condition of being subterraneous.Definitions & examples from Wiktionary (CC BY-SA 3.0).