ketamine hydrochloride vs K

ketamine hydrochloride and K both are nouns.

Word	Noun	Adjective	Verb	Adverb
ketamine hydrochloride	Yes	No	No	No
K	Yes	No	No	No

As nouns, K is a hyponym of ketamine hydrochloride; that is, K is a word with a more specific, narrower meaning than ketamine hydrochloride:

ketamine hydrochloride: a general anesthetic and tranquilizer (not a barbiturate) that is administered intravenously or intramuscularly; used mainly by veterinarians or for minor surgery with geriatric or pediatric patients; taken in large doses it causes hallucinations similar to those associated with the use of PCP
K: street names for ketamine

Other hyponyms of ketamine hydrochloride include cat valium, green, honey oil, jet, special K, super acid, super C.

ketamine hydrochloride (noun)	K (noun)
a general anesthetic and tranquilizer (not a barbiturate) that is administered intravenously or intramuscularly; used mainly by veterinarians or for minor surgery with geriatric or pediatric patients; taken in large doses it causes hallucinations similar to those associated with the use of PCP	street names for ketamine
	the 11th letter of the Roman alphabet
	a unit of information equal to 1024 bytes
	a unit of information equal to 1000 bytes
	the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites
	the cardinal number that is the product of 10 and 100
	a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite