Ethocaine vs local anaesthetic

Ethocaine and local anaesthetic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ethocaine	Yes	No	No	No
local anaesthetic	Yes	No	No	No

As nouns, local anaesthetic is a hypernym of Ethocaine; that is, local anaesthetic is a word with a broader meaning than Ethocaine:

Ethocaine: a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine
local anaesthetic: anesthetic that numbs a particular area of the body

Other hypernyms of Ethocaine include local, local anesthetic, topical anaesthetic, topical anesthetic.

Ethocaine (noun)	local anaesthetic (noun)
a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine	anesthetic that numbs a particular area of the body