lignite

noun 0.780

coal black

noun 0.705

coal bed

noun 0.703

coal

noun 0.692

mineral coal

noun 0.676

coal plant

noun 0.653

coal tar

noun 0.637

coal oil

noun 0.625

coalface

noun 0.624

coal seam

noun 0.619

coking coal

noun 0.619

coal train

noun 0.618

black shale

noun 0.612

oil shale

noun 0.605

charbon

noun 0.601

coal gas

noun 0.596

culm

noun 0.593

coalbed methane

noun 0.588

oil sand

noun 0.587

anthracite

noun 0.585

coalfield

noun 0.584

fossil fuel

noun 0.582

coaling

noun 0.578

brown bread

noun 0.576

black carbon

noun 0.573

coalfish

noun 0.573

coalmining

noun 0.572

black mud

noun 0.569

brown sugar

noun 0.567

brown holland

noun 0.566

brown

noun 0.564

brown ale

noun 0.557

coalminer

noun 0.557

brown dwarf

noun 0.556

black gold

noun 0.555

brown alga

noun 0.552

black lung

noun 0.548

colliery

noun 0.546

bitumen

noun 0.543

firewood

noun 0.540

coal merchant

noun 0.540

coalman

noun 0.539

brownout

noun 0.538

biomass

noun 0.537

kerogen

noun 0.537

basalt

noun 0.537

carbon black

noun 0.536

bunker oil

noun 0.534

bauxite

noun 0.534

bunker fuel

noun 0.531

brown adipose tissue

noun 0.530

briquette

noun 0.529

biotite

noun 0.528

brown rice

noun 0.527

brown study

noun 0.527

collier

noun 0.527

red mud

noun 0.525

charcoal

noun 0.524

golden brown

noun 0.523

brunette

noun 0.522

bituminous

noun 0.521

wood oil

noun 0.518

tar sand

noun 0.516

mudstone

noun 0.515

biofuel

noun 0.512

lignin

noun 0.512

ball clay

noun 0.511

carbon

noun 0.510

carbonaceous chondrite

noun 0.510

crude oil

noun 0.509

kohl

noun 0.505

brown trout

noun 0.504

vitrinite

noun 0.504

shale oil

noun 0.504

old gold

noun 0.504

shale

noun 0.501

carbon burning

noun 0.501

mullock

noun 0.501

humic acid

noun 0.500