tough luck vs toilet

tough luck and toilet both are nouns.

Word	Noun	Adjective	Verb	Adverb
tough luck	Yes	No	No	No
toilet	Yes	No	No	No

As nouns, toilet is a hyponym of tough luck; that is, toilet is a word with a more specific, narrower meaning than tough luck:

Other hyponyms of tough luck include weakness, adversity, hard knocks, hardship, gutter, sewer, hard cheese.

tough luck (noun)	toilet (noun)
an unfortunate state resulting from unfavorable outcomes	the act of dressing and preparing yourself
	a room or building equipped with one or more toilets
	a plumbing fixture for defecation and urination
	misfortune resulting in lost effort or money