early bird
early riser
sunriser
late riser
matutinal
matitudinal
bright and early
first thing
rathe
up with the lark
up with the chickens
morning person
matutinally
waker
get up with the chickens
rise with the lark
early-morning hour
day lark
slumber
sparrow-fart
tomorning
ack emma
wakingly
dawn
midmorning
tomorn
small hours
morningward
wee small hours
morning
callboy
presunrise
at all hours
wokely
oh dark hundred
reveille
ante meridiem
foredawn
yesterdawn
mornward
nighthawk
antemeridian
morn
early night
overnight
premorning
go to bed with the chickens
awakened
early to bed, early to rise, makes a man healthy, wealthy and wise
go to bed with the sun
awaker
sleeping beauty
foreglow
sundawn
half-light
false dawn
somnambulist
noctambulist
sleepwalker
aurorally
oh dark thirty
lamplighter
riser
half-awake
morningness
dawntime
forenoon
dimpsey
dawnlight
break
arousal
nones
ungodly hour
reverse commuter
sleepful
night person
this morning
matinal
waketime
aurorean
auroral
waking dream
burn the candle at both ends
wakeup
lychnobite
postmidnight
morning time
wee hours
darkfall
crack of dawn
monkey hour
Oriental