stallion vs entire

stallion and entire both are nouns.

Word	Noun	Adjective	Verb	Adverb
stallion	Yes	No	No	No
entire	Yes	Yes	No	No

As nouns, stallion and entire are synonyms defined as:

stallion (noun)	entire (noun)
uncastrated adult male horse	uncastrated adult male horse

stallion (adjective)	entire (adjective)
	(of leaves or petals) having a smooth edge; not broken up into teeth or lobes
	(used of domestic animals) sexually competent
	constituting the full quantity or extent; complete
	constituting the undiminished entirety; lacking nothing essential especially not damaged