a mass of
a world of
age group
army
band
battalion
bevy
body
brigade
brood
bunch
cabal
cast
chap
chappie
charm
clique
cloud
clutter
cohort
company
complement
contingent
corps
coterie
cove
crew
crowd
detachment
detail
division
faction
fleet
flight
flock
flocks
gaggle
gang
group
grouping
groupment
guy
hail
hive
host
in-group
incubate
assemblage
gathering
cockatoos
destructible
gemman
hecatomb
semiperishable
teef
unenduring