As a noun tramadol
is a synthetic analgesic opiate used for the relief of pain.
As a proper noun oxycontin is
a controlled-release form of the drug oxycodone.
tramadol
Noun
(
en noun)
A synthetic analgesic opiate used for the relief of pain.
oxycontin
English
Proper noun
A controlled-release form of the drug oxycodone.
References
* OED 2005