divagation vs parenthesis

divagation and parenthesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
divagation	Yes	No	No	No
parenthesis	Yes	No	No	No

As nouns, divagation and parenthesis are synonyms defined as:

divagation and parenthesis: a message that departs from the main subject

Other synonyms of divagation include aside, digression, excursus.

divagation (noun)	parenthesis (noun)
a turning aside (of your course or attention or concern)	either of two punctuation marks (or) used to enclose textual material
a message that departs from the main subject	a message that departs from the main subject