Both are correct, though I would hyphenate "north-west end" etc.
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Ravinathwhy an extra ERN?It makes the direction less precise, more approximate. "The Northern Lights", for example, do not appear only directly north, but in the entire northern part of the sky.
RavinathWhat is correct?Both. Note, however, that the compound directions are single words (southeast, northwestern,
CalifJimBoth. Note, however, that the compound directions are single words (southeast, northwestern, ...).This seems to be a regional thing. According to Google Ngrams, "south-east" traditionally greatly dominates over "southeast" in British English, with the two nearing equal frequency only in recent times. American English has "southeast" way ahead: