Dervish and Whirling dervish

Dervish noun - An ascetic Muslim monk; a member of an order noted for devotional exercises involving bodily movements.

Whirling dervish and dervish are semantically related. In some cases you can replace phrase "Whirling dervish" with "Dervish", this terms are similar.

Whirling dervish noun - A dervish whose actions include ecstatic dancing and whirling.

Dervish and whirling dervish are semantically related. You can use "Dervish" instead a noun phrase "Whirling dervish".