spelunking

noun 0.770

speleothem

noun 0.688

spelunker

noun 0.675

geology

noun 0.644

caving

noun 0.623

gemology

noun 0.612

volcanology

noun 0.611

pedology

noun 0.594

hydrogeology

noun 0.589

sedimentology

noun 0.578

paleontology

noun 0.573

potholing

noun 0.570

glaciology

noun 0.568

archaeology

noun 0.561

planetology

noun 0.554

ichnology

noun 0.554

osteology

noun 0.552

petrology

noun 0.548

palaeontology

noun 0.546

oceanology

noun 0.544

mineralogy

noun 0.542

rockhounding

noun 0.541

geologist

noun 0.538

balneology

noun 0.533

logy

noun 0.533

cave

noun 0.530

geoscience

noun 0.529

lithology

noun 0.529

palynology

noun 0.529

crystallography

noun 0.526

geomorphology

noun 0.517

paleography

noun 0.514

urban exploration

noun 0.514

malacology

noun 0.512

cryptozoology

noun 0.512

herpetology

noun 0.512

geodesy

noun 0.511

stereology

noun 0.511

ology

noun 0.510

stratigraphy

noun 0.508

archaeol

noun 0.508

geography

noun 0.508

geocaching

noun 0.508

ufology

noun 0.507

museology

noun 0.507

dendrology

noun 0.505

soil science

noun 0.504

paleoanthropology

noun 0.504

exploration

noun 0.502

paleobiology

noun 0.502

cave dweller

noun 0.502

graphology

noun 0.502

stalactite

noun 0.501