digression vs message

digression and message both are nouns.

Word	Noun	Adjective	Verb	Adverb
digression	Yes	No	No	No
message	Yes	No	Yes	No

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

Other hypernyms of digression include content, subject matter, substance.

digression (noun)	message (noun)
a turning aside (of your course or attention or concern)	content communicating a message; what something is about
wandering from the main path of a journey	a communication (usually brief) that is written or spoken or signaled
a message that departs from the main subject