twelvemonth
Full calendar span
A twelvemonth is a year—twelve consecutive months.
The word is archaic or deliberately old-fashioned: I haven't seen her in a twelvemonth.
It survives mainly in historical fiction and legal or formal contexts where precision about duration matters.
Occurring every year
- yearlyOnce per annum
- perennialRecurring each year
- biennialEvery second year
- centennialHundred-year anniversary
jubilee · commemoration · milestone · sabbatical · lustrum · recurrence · observance · celebration
Twelve-month duration
- annumYearly period, Latin
- monthsYear's twelve parts
- quarterlyFour times annually
- semesterHalf academic year
trimester · span · stretch · period · interval · cycle · passage · elapsed
Twelve-month duration
- annumYearly period, Latin
- fortnightFourteen-day span
- antiquatedOld and outdated
- literaryOf written works
poetic · formal · dated · Victorian · Dickensian · biblical · archaism
Gathering mature crops
- plantingPlacing seeds in earth
- equinoxSun crosses celestial midline
- solsticeDay of maximum tilt
- migrationMovement to new territory
hibernation · bloom · frost · thaw · monsoon · growing season · fallow · germination
annual
Occurring every year
centennial · jubilee · commemoration · milestone · sabbatical · lustrum · recurrence · observance · celebration · memorial
year
Twelve-month duration
semester · trimester · span · stretch · period · interval · cycle · passage · elapsed · complete
year
Twelve-month duration
- annumYearly period, Latin
- fortnightFourteen-day span
- antiquatedOld and outdated
literary · poetic · formal · dated · Victorian · Dickensian · biblical · archaism
harvest
Gathering mature crops
migration · hibernation · bloom · frost · thaw · monsoon · growing season · fallow · germination · ripening
twelvemonthmoment
Brief period of time
instant · split second · nanosecond · hour · minute
twelvemontheternity
Boundless temporal existence
forever · infinity · perpetuity · timelessness · evermore