subcontinental land mass contiguous land mass contiguous continental land mass per the definition of 'contiguous' of "being in actual contact : touching along a boundary or at a point", these land masses share boundaries with other land masses that are part of the same continent, and thus are not surrounded by water like an island. At some point, we need an 'adjacent to' relation if BFO doesn't provide it. One question is whether this class encompasses fiat parts of islands.