hot pepper vs pepper

hot pepper and pepper both are nouns.

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

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

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

hot pepper: plant bearing very hot medium-sized oblong red peppers; grown principally in the Gulf Coast states for production of hot sauce
pepper: any of various tropical plants of the genus Capsicum bearing peppers

Other hypernyms of hot pepper include capsicum, capsicum pepper plant.

hot pepper (noun)	pepper (noun)
any of various pungent capsicum fruits	pungent seasoning from the berry of the common pepper plant of East India; use whole or ground
plant bearing very hot medium-sized oblong red peppers; grown principally in the Gulf Coast states for production of hot sauce	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

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