deviation vs divagation

deviation and divagation both are nouns.

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

As nouns, deviation and divagation are synonyms defined as:

deviation and divagation: a turning aside (of your course or attention or concern)

Other synonyms of deviation include deflection, deflexion, digression, diversion.

deviation (noun)	divagation (noun)
deviate behavior	a turning aside (of your course or attention or concern)
a turning aside (of your course or attention or concern)	a message that departs from the main subject
the error of a compass due to local magnetic disturbances
the difference between an observed value and the expected value of a variable or function
a variation that deviates from the standard or norm