Timber topping has many synonyms that can be used based on the context of the sentence. Some of the synonyms for timber topping include building materials, lumber, wooden planks, and wood. However, these synonyms may not be an exact replacement for timber topping. For instance, building materials and lumber refer to all types of materials used in construction while timber topping refers specifically to the covering of the building's frame with wooden planks. Therefore, it is essential to use the appropriate synonym to convey the intended meaning accurately. Other synonyms that can be used for timber topping include timber cladding, wood paneling, and siding.