As adverbs the difference between customarily and commonly
is that customarily is (manner) in the customary manner; as is custom while commonly is as a rule; frequently; usually.
customarily
English
Adverb
(
en adverb)
(manner) In the customary manner; as is custom
(frequency) Under normal circumstances, normally.
Synonyms
* (in the customary way) habitually, routinely, wontly, typically, ordinarily, as a matter of course
* (under normal circumstances) usually normally, habitually, regularly, routinely, wontly, typically, ordinarily, as a matter of course, as a rule
commonly
English
Adverb
(
en adverb)
as a rule; frequently; usually
(obsolete) in common; familiarly
- (Spenser)