board

As an adjective selective

is .

As a noun board is

a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound.

As a verb board is

to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

In nautical|lang=en terms the difference between board and billboard

is that board is (nautical) to capture an enemy ship by going alongside and grappling her, then invading her with a boarding party while billboard is (nautical) a piece of thick plank, armed with iron plates, and fixed on the bow or fore channels of a vessel, for the bill or fluke of the anchor to rest on.

As nouns the difference between board and billboard

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound while billboard is a very large advertisement along the side of a highway.

As a verb board

is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As nouns the difference between board and chat

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound while chat is a chat, exchange of text or voice messages in real time, notably by internet.

As a verb board

is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As nouns the difference between rack and board

is that rack is dress, skirt while board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound.

As a verb board is

to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As nouns the difference between board and byard

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound while byard is (historical) a piece of leather crossing the breast, used by the men who drag sledges in coal mines.

As a verb board

is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As nouns the difference between board and bourd

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound while bourd is (obsolete) a joke; jesting, banter.

As verbs the difference between board and bourd

is that board is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance while bourd is (obsolete) to jest.

As nouns the difference between board and boart

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making while boart is an alternative spelling of lang=en.

As a verb board

is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As nouns the difference between board and boars

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound while boars is .

As a verb board

is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As nouns the difference between board and hoard

is that board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound while hoard is a hidden supply or fund.

As verbs the difference between board and hoard

is that board is to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance while hoard is to amass, usually for one's personal collection.