word vs computer memory unit

word and computer memory unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
word	Yes	No	Yes	No
computer memory unit	Yes	No	No	No

As nouns, computer memory unit is a hypernym of word; that is, computer memory unit is a word with a broader meaning than word:

word (noun)	computer memory unit (noun)
a unit of language that native speakers can identify	a unit for measuring computer memory
a promise
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)	computer memory unit (verb)
put into words or an expression