broadcast vs disseminate

broadcast is a noun but disseminate is not a noun.

Word	Noun	Adjective	Verb	Adverb
broadcast	Yes	No	Yes	No
disseminate	No	No	Yes	No

As verbs, broadcast and disseminate are synonyms defined as:

broadcast (noun)	disseminate (noun)
message that is transmitted by radio or television
a radio or television show

broadcast (verb)	disseminate (verb)
cause to become widely known	cause to become widely known
broadcast over the airwaves, as in radio or television
sow over a wide area, especially by hand