word vs kB

word and kB both are nouns.

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

word (noun)	kB (noun)
a unit of language that native speakers can identify	a unit of information equal to 1024 bytes
a promise	a unit of information equal to 1000 bytes
information about recent and important events
a brief statement
an exchange of views on some topic
a secret word or phrase known only to a restricted group
a verbal command for action
a string of bits stored in computer memory

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