periodic
periodical
annual
biannual
biennial
bimonthly
biweekly
catamenial
centenary
centennial
circadian
dail
daily
daybook
daytime
decennial
everyday
fortnightly
hebdomadal
hourly
journal
menstrual
momentary
momently
monthly
quarterly
quotidian
regular
secular
semestral
semiannual
semimonthly
semiweekly
semiyearly
tertian
triennial
weekly
yearly
carnivorous
cyclical
easterly
ecbolic
insectivorous
intraday
irritative
limbless
migratory
nocturnal
repetitive
seasonal
sideways
three-month
two-week
up-and-down
well-marked
colonel
eternal
external
fraternal
infernal
internal
kernel
maternal
paternal
vernal