white pepper vs pepper

white pepper and pepper both are nouns.

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

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

white pepper: pepper ground from husked peppercorns
pepper: pungent seasoning from the berry of the common pepper plant of East India; use whole or ground

Other hypernyms of white pepper include peppercorn.

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

white 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 white pepper include black pepper, common pepper, Madagascar pepper, Piper nigrum.

white pepper (noun)	pepper (noun)
pepper ground from husked peppercorns	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

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