latest vs word

latest and word both are nouns.

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

As nouns, word is a hypernym of latest; that is, word is a word with a broader meaning than latest:

Other hypernyms of latest include intelligence, news, tidings.

latest (noun)	word (noun)
the most recent news or development	a unit of language that native speakers can identify
	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

latest (adjective)	word (adjective)
up to the immediate present; most recent or most up-to-date
in the current fashion or style

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