vuller
Vuller is a Dutch noun meaning a filler or material used to fill gaps or to add volume. The word derives from the verb vullen, “to fill,” with the agent-noun suffix -er. The sense is broad and covers materials used to occupy space, smooth irregularities, or modify a composite’s properties.
In construction and DIY, vullers include putty, spackle, plaster, and similar compounds used to fill holes, seams,
In cosmetics and medicine, fillers are substances used to restore volume, fill wrinkles, or augment soft tissue.
The word also occurs as a surname in some cases, indicating possible historical association with occupations