It cud be Iceberg but i think its probably icicle! technically that's not 7 l;etters but it sounds betta that mooo!
chilled
icicles
areoles
KeepingKnelledKeelingKillersKingpinKnowing
yelling
That's an unusual question.
zoology
crinkle
Primper.
firepitfirefly
Certain
lightly