word vs discussion

word and discussion both are nouns.

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

As nouns, word and discussion are synonyms defined as:

Other synonyms of word include give-and-take.

word (noun)	discussion (noun)
a unit of language that native speakers can identify	an exchange of views on some topic
a promise	an extended communication (often interactive) dealing with some particular topic
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)	discussion (verb)
put into words or an expression