knockdown-dragout vs knock-down-and-drag-out

knockdown-dragout and knock-down-and-drag-out both are adjectives.

Word	Noun	Adjective	Verb	Adverb
knockdown-dragout	No	Yes	No	No
knock-down-and-drag-out	No	Yes	No	No

As adjectives, knockdown-dragout and knock-down-and-drag-out are synonyms defined as:

knockdown-dragout (adjective)	knock-down-and-drag-out (adjective)
extremely violent	extremely violent