flushless toilet vs throne

flushless toilet and throne both are nouns.

Word	Noun	Adjective	Verb	Adverb
flushless toilet	Yes	No	No	No
throne	Yes	No	Yes	No

As nouns, throne is a hypernym of flushless toilet; that is, throne is a word with a broader meaning than flushless toilet:

flushless toilet: a toilet that relies on bacteria to break down waste matter (instead of using water)
throne: a plumbing fixture for defecation and urination

Other hypernyms of flushless toilet include can, commode, crapper, pot, potty, stool, toilet.

flushless toilet (noun)	throne (noun)
a toilet that relies on bacteria to break down waste matter (instead of using water)	the position and power of an exalted person (a sovereign or bishop) who is entitled to sit in a chair of state on ceremonial occasions
	the chair of state for a monarch, bishop, etc.
	a plumbing fixture for defecation and urination

flushless toilet (verb)	throne (verb)
	put a monarch on the throne
	sit on the throne as a ruler