oil shale

noun 0.603

kerosene

noun 0.595

vitrinite

noun 0.579

black shale

noun 0.573

inertinite

noun 0.569

lignite

noun 0.564

alkenone

noun 0.564

coal oil

noun 0.564

rock oil

noun 0.561

methanogen

noun 0.560

sapropel

noun 0.557

organogel

noun 0.555

keratin

noun 0.554

biocrude

noun 0.551

hydrocarbon

noun 0.549

xerogel

noun 0.544

diagenesis

noun 0.543

oil sand

noun 0.542

shale oil

noun 0.542

organic matter

noun 0.541

wood oil

noun 0.539

petrochemical

noun 0.539

brown coal

noun 0.537

petroleum coke

noun 0.536

orogen

noun 0.534

oil gas

noun 0.533

terpenoid

noun 0.531

geotherm

noun 0.530

fossil fuel

noun 0.530

terpene

noun 0.529

lignin

noun 0.529

gilsonite

noun 0.529

coal tar

noun 0.528

crude oil

noun 0.527

petrochemistry

noun 0.524

cryogel

noun 0.524

gas hydrate

noun 0.523

aerogel

noun 0.522

ketone

noun 0.520

ergosterol

noun 0.520

tar sand

noun 0.519

resinoid

noun 0.518

arkose

noun 0.517

olefin

noun 0.517

carbonaceous chondrite

noun 0.516

bunker oil

noun 0.515

biochar

noun 0.515

oil

noun 0.514

keratosis

noun 0.513

ketene

noun 0.512

isoprenoid

noun 0.512

coprolite

noun 0.512

carnotite

noun 0.512

pyrenoid

noun 0.511

kieselguhr

noun 0.511

zymogen

noun 0.511

ketogenesis

noun 0.510

coal

noun 0.510

coal gas

noun 0.510

pyrolysis

noun 0.509

biogas

noun 0.508

methanogenesis

noun 0.506

oilrig

noun 0.506

coking coal

noun 0.505

creosote

noun 0.504

pyrogallol

noun 0.503

sapogenin

noun 0.502

organoclay

noun 0.502

argan

noun 0.501

glycerol

noun 0.501

fossil

noun 0.500

shale

noun 0.500

organic compound

noun 0.500