deep water vs trouble

deep water and trouble both are nouns.

Word	Noun	Adjective	Verb	Adverb
deep water	Yes	No	No	No
trouble	Yes	No	Yes	No

As nouns, trouble is a hypernym of deep water; that is, trouble is a word with a broader meaning than deep water:

Other hypernyms of deep water include problem.

deep water (noun)	trouble (noun)
serious trouble	an effort that is inconvenient
	a source of difficulty
	an event causing distress or pain
	an angry disturbance
	a strong feeling of anxiety
	an unwanted pregnancy

deep water (verb)	trouble (verb)
	cause bodily suffering to and make sick or indisposed
	disturb in mind or make uneasy or cause to be worried or alarmed
	move deeply
	to cause inconvenience or discomfort to
	take the trouble to do something; concern oneself