theobromine

noun 0.591

henbane

noun 0.565

theophylline

noun 0.561

bisabolene

noun 0.555

betaine

noun 0.553

noscapine

noun 0.545

opium

noun 0.528

theanine

noun 0.521

diacetylmorphine

noun 0.519

opiate

noun 0.518

catharanthine

noun 0.515

papaverine

noun 0.514

theca

noun 0.510

ethylmorphine

noun 0.510

diprenorphine

noun 0.508

morphine

noun 0.507

betulinic acid

noun 0.502

codeine

noun 0.501