Spackle

a powdery substance mixed with water to form a paste that dries hard, used to fill holes, cracks, etc. in wallboard, wood, etc.

Etymology: prob. adapted < Ger spachtel, spatula, spachteln, to fill or smooth (a surface), ult. < L spatula: see spatula

noun

this substance

transitive verb -·led, -·ling

to fill, or cover the holes, etc. in, with spackle