spike, cluster

RACEME
WordClue
HEELAchilles' or spike
BUNCHcluster, group
CROWDcluster, aggregation
SPIKEraceme, cluster
TRUSScluster, bunch
UMBELspike, raceme
CATKINspike, corymb
CORYMBspike, umbel
STINGERspike strip
WORKHOUSEspike
CONGLOMERATEcluster of heterogeneous things
WORKHOUSEspike
CATKINspike, corymb