1. (noun) an amount of time

• period
• time period

1. (noun) an amount of time

• age
• long time
• years
• air alert
• bimester
• bimillenary
• bimillennium
• bloom
• blossom
• efflorescence
• flower
• flush
• heyday
• peak
• prime
• bout
• bronze age
• calendar day
• civil day
• calendar month
• month
• calendar week
• week
• canicular days
• canicule
• dog days
• century
• clotting time
• continuance
• duration
• dark
• night
• nighttime
• dawn
• day
• daylight
• daytime
• day
• decade
• decennary
• decennium
• downtime
• drought
• drouth
• duty tour
• enlistment
• hitch
• term of enlistment
• tour
• tour of duty
• early days
• youth
• elapsed time
• epoch
• era
• eve
• evening
• evening
• extra time
• overtime
• festival
• field day
• forenoon
• morn
• morning
• morning time
• fortnight
• two weeks
• generation
• golden age
• great year
• platonic year
• half life
• half-life
• half-century
• hebdomad
• week
• honeymoon
• hospitalization
• hour
• hours
• incubation period
• indian summer
• saint martin's summer
• indiction
• iron age
• lactation
• lease
• term of a contract
• life
• life-time
• lifespan
• lifetime
• life
• life
• long haul
• long run
• lunar time period
• tide
• lustrum
• mid-april
• mid-august
• mid-december
• mid-february
• mid-january
• mid-july
• mid-june
• mid-march
• mid-may
• mid-november
• mid-october
• mid-september
• midweek
• midwinter
• millenary
• millennium
• multistage
• nap
• sleep
• night
• night
• night
• noviciate
• novitiate
• occupation
• olympiad
• past
• peacetime
• phase
• stage
• phase of the moon
• prehistoric culture
• prehistory
• prohibition
• prohibition era
• puerperium
• quadrennium
• quarter
• quarter-century
• question time
• quinquennium
• rainy day
• real time
• real time
• regulation time
• reign
• run
• running time
• school
• school day
• schooltime
• season
• time of year
• season
• season
• semester
• shelf life
• silly season
• silver age
• study hall
• term
• test period
• trial period
• time
• time
• time frame
• time limit
• time of life
• time off
• times
• travel time
• trimester
• twelvemonth
• year
• yr
• uptime
• usance
• wartime
• watch
• weekend
• window
• work time
• year
• year

1. (noun) an amount of time

• fundamental measure
• fundamental quantity