Linguists, settling some inscrutable grudge, have been steadily sneaking more backdated synonyms for 'sharing borders' into the dictionary. They've added 'contiguous,' 'coterminous,' 'conterminous,' and next year they're adding 'conterguous.'

Poorly Drawn Lines – Been a Fish

It's frustrating to calibrate your precautions when there's only one kind of really definitive feedback you can get, you can only get it once, and when you do it's too late.