The phrase "a baseboard" is correct and usable in written English.
It can be used when referring to a board that runs along the bottom of a wall, typically used to cover the joint between the wall and the floor.
Example: "The contractor installed a new baseboard in the living room to give it a fresh look."
Alternatives: "a skirting board" or "a floorboard."
Rub it against a baseboard and its static charge will attract dust.
She wasn't groping under a baseboard heater for a phantom rock.
(That's an old '30s flourish where the drywall "floats" a few inches above the floor, leaving a cutaway where you'd expect to see a baseboard).
McEnroe, who had played a doubles match before taking on Borg, was in character, slamming his racket against a baseboard and holding his hands on his hips after losing several points.
They showed a remarkable ability to wiggle their way along a baseboard, constantly turning into it so that the side brushes could get right to the edge of the floor.
I gave a $3,500 circa 1880 jasparware urn perched on a console a run for its money when I skittled it briefly looking for a baseboard plug for my cellular phone.
The enlarger is a projection system on a vertical column mounted on a horizontal baseboard.
The article described the way postage-stamp-size shingles were "split with a razor-like tool" and "carefully nailed to a small wall section" to mimic cedar-shake siding on a house, and how a sliding gadget a kind of miniature vice was "specially built to hold a bit in place during cutting of a tiny baseboard molding".
You can purchase a special baseboard stripping pad if you are using a floor machine.
The undulating curves of a car (from which Hondo leans into the wind, his face full of ecstasy and yearning -- all sniff, if you know what I mean) suggest a 40's-era black Ford; a room is all baseboard and window frame, and maybe flowered wallpaper; a sandwich is made from white bread as Wonder Bread-curvy as the car.
These included installing new windows, adding a banister at the bottom of the main staircase and adding a second baseboard heat zone on the second floor.
