Related by context. Frequent words. (Click for all words.) 78 pheromone 58 scents 58 oxytocin 56 scent 54 wasps 53 endorphins 53 stress hormones 53 fruit flies 52 hormones 52 bees 51 olfactory 50 neurotransmitters 50 sexual arousal 50 neurotransmitter 49 serotonin 48 dopamine 48 hormone 48 odors 48 wasp 48 mating 48 arousal 48 aroma 48 saliva 47 moths 47 physiological 47 hormonal 47 signaling molecules 47 secretions 47 pollinators 47 insects 47 beetles 46 Drosophila 46 cortisol 46 hypothalamus 46 Hormones 46 estrogens 46 histamine 45 musk 45 receptors 45 vocalizations 45 repellents 45 ants 45 stimuli 45 endorphin 44 sweat glands 44 perfume 44 nematodes 44 Serotonin 44 ovulating 44 odor 44 aromas 44 larvae 44 norepinephrine 44 pollen 44 rodents 44 insect 43 Dopamine 43 immune cells 43 smell 43 humans 43 glands 43 neuron 43 glutamate 43 fragrance 43 mosquitoes 43 ovulation 43 acetylcholine 43 fragrances 43 chemicals 43 estrogen 43 voles 42 beneficial insects 42 honeybees 42 insecticides 42 fungi 42 honey bees 42 cytokines 42 adenosine 42 C. elegans 42 inhibitory 42 essential oils 42 nicotine 42 nitric oxide 42 biologically 42 perfumes 42 neurons 41 neural 41 aphrodisiacs 41 pesticides 41 molecules 41 secretion 41 spiders 41 capsaicin 41 toxin 41 aphids 41 repellant 41 rats 41 physiology 41 frogs 41 mammalian 41 chemically