Related by context. Frequent words. (Click for all words.) 65 poison ivy 61 fungal spores 61 oxalic acid 60 Poison ivy 59 sebaceous glands 58 oxidizes 58 allergenic 57 pollens 57 sebum 57 itchy rash 57 acidic foods 56 salicylic acid 56 naturally occurring bacteria 56 insecticidal soap 55 histamines 55 fungus 55 Essential oils 54 alkaloids 54 noxious chemicals 54 contact dermatitis 54 oily residue 54 toxic byproducts 53 organic acids 53 whiteflies 53 mucous membranes 53 ragweed 53 spores 53 poison oak 53 acrolein 53 pollen 53 wintergreen 53 citronella 53 flower buds 53 microorganism 53 Hydrochloric acid 52 pollen grains 52 bacteria 52 droplets 52 allergens 52 witch hazel 52 ragweed pollen 52 sun ultraviolet rays 52 carbonic acid 52 secretions 52 naturally occurring substance 51 fungi 51 organic solvents 51 chlorine bleach 51 formic acid 51 retinoids 51 chiggers 51 powdery mildew 51 Allergic reactions 51 mold spores 51 blackheads 51 Phytophthora 51 Allergens 51 alkaloid 51 toxins 51 weed seeds 50 incomplete combustion 50 toxin 50 skin irritation 50 spider mites 50 allergen 50 candida 50 outermost layer 50 Triclosan 50 containing DEET 50 flower stalks 50 Hydrogen peroxide 50 isopropyl alcohol 50 IgE antibodies 50 fungal diseases 50 seedpods 50 cuticle 50 bioavailable 50 creosote 50 mucous membrane 50 ultra violet rays 49 permethrin 49 bacterium 49 yeast infection 49 neem 49 neurotoxins 49 Mildew 49 applied topically 49 rhizomes 49 Quercetin 49 harmful toxins 49 volatiles 49 skin irritations 49 oxidants 49 Baking soda 49 phenolic compounds 49 emollients 49 granulomas 49 mites 49 isoprene 49 aphids 49 Staph bacteria