take a breath
chillax
unruffle
relax
slow one's roll
calm your farm
encalm
sort oneself out
jam one's hype
get ahold of oneself
keep one's shirt on
still
defreak
calmative
calm
level
undisturbed
lay chilly
keep one's hair on
salve
placify
tranquilize
keep one's pants on
lull
quieten
calm down
quiet
tranquillise
tranquillize
hose down
sile
compose
self-possession
pacifyingly
calmingly
easy does it
calmingness
tranquillizingly
calmness
lown
lullful
uncalm
allay
pour oil on troubled waters
subside
keep one's knickers on
untranquilize
chill
calmen
shushy