pleonaste vs spinel

pleonaste and spinel both are nouns.

Word	Noun	Adjective	Verb	Adverb
pleonaste	Yes	No	No	No
spinel	Yes	No	No	No

As nouns, spinel is a hypernym of pleonaste; that is, spinel is a word with a broader meaning than pleonaste:

pleonaste: a dark-colored spinel containing iron
spinel: a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones

pleonaste (noun)	spinel (noun)
a dark-colored spinel containing iron	a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones