brown coal

noun 0.780

lignin

noun 0.703

lignum

noun 0.629

anthracite

noun 0.619

coal

noun 0.616

mineral coal

noun 0.600

lignocellulose

noun 0.588

lignosulfonate

noun 0.586

limestone

noun 0.583

coal bed

noun 0.582

liptinite

noun 0.582

coal black

noun 0.579

oil shale

noun 0.578

vitrinite

noun 0.573

lignocellulosic

noun 0.572

kerogen

noun 0.564

black shale

noun 0.556

graphite

noun 0.555

coal oil

noun 0.554

lith

noun 0.554

charbon

noun 0.554

limonite

noun 0.553

culm

noun 0.549

lignotuber

noun 0.548

coal tar

noun 0.544

fossil fuel

noun 0.543

shale

noun 0.543

coal seam

noun 0.542

illite

noun 0.540

coking coal

noun 0.539

coal gas

noun 0.539

lithic

noun 0.538

briquette

noun 0.537

lite

noun 0.537

oil sand

noun 0.536

argillite

noun 0.535

lint

noun 0.533

charcoal

noun 0.532

biotite

noun 0.532

lignum vitae

noun 0.532

linden

noun 0.530

magnetite

noun 0.530

limewood

noun 0.530

bitumen

noun 0.530

lithification

noun 0.529

mudstone

noun 0.528

lentil

noun 0.527

sedimentary

noun 0.524

laterite

noun 0.524

bituminous

noun 0.523

inertinite

noun 0.523

lepidolite

noun 0.523

coal plant

noun 0.523

natural gas

noun 0.521

lithology

noun 0.517

colliery

noun 0.516

coalmining

noun 0.516

siltstone

noun 0.515

bentonite

noun 0.515

loess

noun 0.514

fossil

noun 0.513

lit

noun 0.512

lithium

noun 0.511

collier

noun 0.511

quicklime

noun 0.511

coalface

noun 0.511

coalbed methane

noun 0.511

bauxite

noun 0.508

coaling

noun 0.507

coprolite

noun 0.507

lignocaine

noun 0.507

coal train

noun 0.506

sedimentary rock

noun 0.505

lime

noun 0.502

coalminer

noun 0.500