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A Marilyn is any mountain in Britain or Ireland with a prominence over 150m, regardless of height.
A Hump (Hundred and upwards Metre Prominence) is any mountain in Britain or Ireland with a prominence over 100m, regardless of height.
A Simm is any mountain in Britain or Ireland with a prominence over 30m and a height above 600m.
A Highland Five is a peak in the Scottish Highlands with a height between 500m and 2,000ft and a prominence greater then 30m.
