| Answer | Crossword Clue |
|---|---|
| inlays | to set into a surface or ground material |
| inlayer | to set into a surface or ground material |
| riblets | any of a series of microscopic grooves set into a material that is applied to the exterior surface of aircraft or boats to reduce drag |
| riblet | any of a series of microscopic grooves set into a material that is applied to the exterior surface of aircraft or boats to reduce drag |
| terrazzo | Flooring material consisting of chips of marble or granite set in concrete and polished to give a smooth surface |
| rake | an implement equipped with projecting prongs to gather material (as leaves) or for loosening or smoothing the surface of the ground |
