Noun Clause contains a subject and verb and can do anything that a noun can do
A Noun Phrase, frequently a noun accompanied by modifiers, is a group of related words acting as a noun: the oil depletion allowance; the abnormal, hideously enlarged nose.
There is a separate section on word combinations that become Compound Nouns — such as daughter-in-law, half-moon, and stick-in-the-mud.