Pollyanna
sunniness
cheerfulness
cheer
sunshine
Mark Tapleyism
happy as a lark
Pollyannaishly
optimistically
Pollyannaism
good nature
sanguine
bright
sanguineous
cheerful
sunshiney
Micawberesque
unsanguine
yeasayer
sunriser
uphearted
Micawberly
rosy
rose-colored
uncheery
rose-coloured
good-humouredness
good-naturedness
good-temperedness
rapt
good-humoredness
cherophobia
vogie
chipper
overoptimist
sanguineness
sanguinity
optimist
enthusiast
partisan
Panglossianism
partizan
pollyannaish
here for it
upbeat
hope
bliss ninny
expand
cock of the roost
Oppy
cock of the walk
exultant
Pollyannish
happy camper
overhope
amiability
swaggering
optimistical
good temper
good humour
glass-half-full
good humor
on cloud nine
prisoner of hope
rooter
upful
boomsayer
bullish
beamish
rose-colored glasses
dismal Jimmy
rosily
happily
twinkly
skeptimist
overoptimism
turn the frown upside down
smiling
happy-go-lucky
mope
delighter
lofty
moon around
moon about
overglad
uplifted
lift someone's spirits
eupeptically
fanatic
upbeatness
blissful
cock-a-hoop
saint
doom-and-gloomer
Lord be praised
gloomy
elation

English words for 'One who is persistently cheerful and optimistic, even when given cause not to be so.'

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