periodic
periodical
annual
annually
biannual
biennial
bimonthly
biweekly
catamenial
centenary
centennial
daily
decennial
diurnal
fortnightly
hebdomadal
hourly
menstrual
momentary
momently
monthly
per annum
perennial
perennially
quarterly
quotidian
regular
regularly
secular
semestral
semiannual
semimonthly
semiweekly
semiyearly
tertian
triennial
weekly
year after year
additional
cumulative
exorbitant
moderate
monetary
nightly
nominal
seasonal
short-term
successive
upcoming
austerely
cavalierly
clearly
dearly
merely
nearly
severely
sincerely