cool as a cucumber
imperturbability
settle
sile
keep one's head
have one's wits about one
complacently
keep one's cool
coolness
imperturbableness
self-possessedly
compose
composed
calmen
cucumber
countenance
self-possession
chill out
soft
cool it
easy
ice cool
cool off
calm down
calm
settle down
simmer down
sedately
easy does it
pour oil on troubled waters
hang tough
bestill
even-tempered
cowardly
hose down
fearful
cool
plussed
crawlingly
even-mindedly
self-confidently
coolheaded
cool cat
soothe
nerveless
ice-calm
centered
salve
humblish
heropanti
keep one's knickers on
bear up
humbly
equanimous
meekly
untumultuous
pensiveness
unconcern
presence of mind
nonchalance
indifference
undismayed
vainly
get ahold of oneself
orderly
decompress
unbend
resourcefulness
self-complacent
pacifically
phlegm
freeheartedly
relax
slow down
unwind
take something in stride
loosen up
placify
unction
tranquilizing
oiliness
unctuousness
smarminess
fulsomeness
oleaginousness
keep one's hair on
comfortable in one's own skin
superior
smugly
down to a science
put on a brave face
laid-back
sanely
smug
serene