clay vs bleaching earth

clay and bleaching earth both are nouns.

Word	Noun	Adjective	Verb	Adverb
clay	Yes	No	No	No
bleaching earth	Yes	No	No	No

As nouns, bleaching earth is a hyponym of clay; that is, bleaching earth is a word with a more specific, narrower meaning than clay:

Other hyponyms of clay include bleaching clay, mud pie, mire, slop.

clay (noun)	bleaching earth (noun)
the dead body of a human being	an adsorbent clay that will remove coloring from oils
a very fine-grained soil that is plastic when moist but hard when fired
water soaked soil; soft wet earth