black pepper vs pepper

black pepper and pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
black pepper	Yes	No	No	No
pepper	Yes	No	Yes	No

As nouns, pepper is a hypernym of black pepper; that is, pepper is a word with a broader meaning than black pepper:

black pepper: pepper that is ground from whole peppercorns with husks on
pepper: pungent seasoning from the berry of the common pepper plant of East India; use whole or ground

Other hypernyms of black pepper include peppercorn.

As nouns, black pepper and pepper are synonyms defined as:

black pepper and pepper: climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam

Other synonyms of black pepper include common pepper, Madagascar pepper, Piper nigrum, white pepper.

black pepper (noun)	pepper (noun)
pepper that is ground from whole peppercorns with husks on	pungent seasoning from the berry of the common pepper plant of East India; use whole or ground
climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam	sweet and hot varieties of fruits of plants of the genus Capsicum
	any of various tropical plants of the genus Capsicum bearing peppers
	climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam

black pepper (verb)	pepper (verb)
	attack and bombard with or as if with missiles
	add pepper to