diacetylmorphine

noun 0.727

morphine

noun 0.724

diamorphine

noun 0.675

hydromorphone

noun 0.642

morphia

noun 0.612

levorphanol

noun 0.606

metaraminol

noun 0.603

morph

noun 0.592

methedrine

noun 0.591

met-enkephalin

noun 0.584

pethidine

noun 0.583

meperidine

noun 0.583

morpholine

noun 0.580

codeine

noun 0.578

diprenorphine

noun 0.578

methadone

noun 0.574

dihydrocodeine

noun 0.570

morpho

noun 0.562

emetine

noun 0.558

ergotamine

noun 0.556

opiate

noun 0.555

ethylamine

noun 0.548

methamphetamine

noun 0.547

phenmetrazine

noun 0.546

oxycodone

noun 0.545

enkephalin

noun 0.540

opium

noun 0.539

tramadol

noun 0.537

hydrocodone

noun 0.537

ergometrine

noun 0.535

allomorph

noun 0.534

heroin

noun 0.534

aminophylline

noun 0.534

methenamine

noun 0.534

opioid

noun 0.534

oxymetholone

noun 0.534

methacrolein

noun 0.533

methylamine

noun 0.532

dextromethorphan

noun 0.532

methanone

noun 0.528

pheniramine

noun 0.528

butorphanol

noun 0.527

dimethenamid

noun 0.522

oxycontin

noun 0.521

noscapine

noun 0.519

amoxapine

noun 0.519

metamorphic

noun 0.519

amethocaine

noun 0.518

metol

noun 0.518

amphetamine

noun 0.518

morphing

noun 0.516

ephedrine

noun 0.515

aminomethyl

noun 0.515

almitrine

noun 0.514

methomyl

noun 0.513

ethionamide

noun 0.513

remifentanil

noun 0.513

cyclohexylamine

noun 0.513

nonnarcotic

noun 0.512

bimorph

noun 0.510

thebaine

noun 0.510

mesepimeron

noun 0.509

emeraldine

noun 0.509

phosphoramide

noun 0.506

endomorph

noun 0.505

methoxyethyl

noun 0.505

ethchlorvynol

noun 0.504

homatropine

noun 0.504

narcotic

noun 0.503

pseudoephedrine

noun 0.502

metaldehyde

noun 0.501

enamine

noun 0.501

chlorphenamine

noun 0.501

phosphoramidate

noun 0.500