stockist vs provider

stockist and provider both are nouns.

Word	Noun	Adjective	Verb	Adverb
stockist	Yes	No	No	No
provider	Yes	No	No	No

As nouns, provider is a hypernym of stockist; that is, provider is a word with a broader meaning than stockist:

stockist: one (as a retailer or distributor) that stocks goods
provider: someone whose business is to supply a particular service or commodity

Other hypernyms of stockist include supplier.

stockist (noun)	provider (noun)
one (as a retailer or distributor) that stocks goods	someone whose business is to supply a particular service or commodity
	someone who provides the means for subsistence