trouble vs deep water

trouble and deep water both are nouns.

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

As nouns, deep water is a hyponym of trouble; that is, deep water is a word with a more specific, narrower meaning than trouble:

Other hyponyms of trouble include pressure point, can of worms, growing pains, hydra, matter.

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

trouble (verb)	deep water (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