overlay

nouns

protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior
overlay, overlayer, sheathing
a layer of decorative material (such as gold leaf or wood veneer) applied over a surface
overlay
is a type of (narrower)
something used to beautify
decoration, ornament, ornamentation
is a type of (narrower)
single thickness of usually some homogeneous substance
"slices of hard-boiled egg on a bed of spinach"
bed, layer

verbs

put something on top of something else
"cover the meat with a lot of gravy"
cover, overlay
is derived from
overlayer
kill by lying on
"The sow overlay her piglets"
overlay, overlie