nonperiod

As a noun terms

is .

As an adjective nonperiod is

not associated with a (financial or historical) period.

As adjectives the difference between period and nonperiod

is that period is appropriate for a given historical era while nonperiod is not associated with a (financial or historical) period.

As an interjection period

is (chiefly|north america) and nothing else; and nothing less; used for emphasis.

As a noun period

is (obsolete|medicine) the length of time for a disease to run its course.

As a verb period

is (obsolete|intransitive) to come to a period; to conclude.