word vs K

word and K both are nouns.

Word	Noun	Adjective	Verb	Adverb
word	Yes	No	Yes	No
K	Yes	No	No	No

word (noun)	K (noun)
a unit of language that native speakers can identify	street names for ketamine
a promise	the 11th letter of the Roman alphabet
information about recent and important events	a unit of information equal to 1024 bytes
a brief statement	a unit of information equal to 1000 bytes
an exchange of views on some topic	the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites
a secret word or phrase known only to a restricted group	the cardinal number that is the product of 10 and 100
a verbal command for action	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
a string of bits stored in computer memory

word (verb)	K (verb)
put into words or an expression