stigma vs cloven hoof

stigma and cloven hoof both are nouns.

Word	Noun	Adjective	Verb	Adverb
stigma	Yes	No	No	No
cloven hoof	Yes	No	No	No

As nouns, cloven hoof is a hyponym of stigma; that is, cloven hoof is a word with a more specific, narrower meaning than stigma:

Other hyponyms of stigma include demerit, bar sinister, bend sinister, cloven foot.

stigma (noun)	cloven hoof (noun)
a skin lesion that is a diagnostic sign of some disease	a hoof divided into two parts at its distal extremity (as of ruminants or swine)
an external tracheal aperture in a terrestrial arthropod	the mark of Satan
a symbol of disgrace or infamy
the apical end of the style where deposited pollen enters the pistil