Weed killers are products used to eliminate unwanted plants from gardens and lawns. The two crossword solutions for the term 'weed killers' are HOERS (5 letters) and HOES (4 letters). HOERS stands for Herbicides, Organic, Environmental, Residual, and Synthetic, which are all types of weed killers. HOES stands for Hand, Organic, Environmental, and Synthetic, which are all methods of applying weed killers.