word vs password

word and password both are nouns.

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

As nouns, word and password are synonyms defined as:

word and password: a secret word or phrase known only to a restricted group

Other synonyms of word include countersign, parole, watchword.

word (noun)	password (noun)
a unit of language that native speakers can identify	a secret word or phrase known only to a restricted group
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)	password (verb)
put into words or an expression