manure vs horse manure

manure and horse manure both are nouns.

Word	Noun	Adjective	Verb	Adverb
manure	Yes	No	Yes	No
horse manure	Yes	No	No	No

As nouns, horse manure is a hyponym of manure; that is, horse manure is a word with a more specific, narrower meaning than manure:

manure: any animal or plant material used to fertilize land especially animal excreta usually with litter material
horse manure: horse excreta used as fertilizer

Other hyponyms of manure include chicken manure, cow manure, green manure, night soil.

manure (noun)	horse manure (noun)
any animal or plant material used to fertilize land especially animal excreta usually with litter material	horse excreta used as fertilizer

manure (verb)	horse manure (verb)
spread manure, as for fertilization