bling vs jewellery

bling and jewellery both are nouns.

Word	Noun	Adjective	Verb	Adverb
bling	Yes	No	No	No
jewellery	Yes	No	No	No

As nouns, jewellery is a hypernym of bling; that is, jewellery is a word with a broader meaning than bling:

bling: flashy, ostentatious jewelry
jewellery: an adornment (as a bracelet or ring or necklace) made of precious metals and set with gems (or imitation gems)

Other hypernyms of bling include jewelry.

bling (noun)	jewellery (noun)
flashy, ostentatious jewelry	an adornment (as a bracelet or ring or necklace) made of precious metals and set with gems (or imitation gems)