mopboard

[mop-bawrd, -bohrd] /ˈmɒpˌbɔrd, -ˌboʊrd/
noun
1.
baseboard (def 1).
Origin
1850-55, Americanism; mop1 + board, so called because it adjoins the floor surface, which is cleaned by a mop
British Dictionary definitions for mopboard

mopboard

/ˈmɒpˌbɔːd/
noun
1.
a US word for skirting board