quicklime limestone linden basswood distemper paint whitening whitewash cement plaster mortar concrete clay putty grout birdlime gunk lute mud sand tar filling sealant pointing concretion emerald beryl forest jade kelly moss olive sage bice chartreuse malachite spinach verdigris vert viridian khaki avocado green greenish pine aquamarine pea fir sea aqua apple grass sap willow glaucous virescent citrus limy fertilize compost feed manure mulch dress dung enrich fecundate fructify beget breed cover generate germinate muck nourish procreate propagate treat improve fertilise insulate protect