Answer: obelisks

AnswerCrossword Clue
OBELISKS

Tapering pillars

OBELISKS

The Washington Monument et al.

OBELISKS

Cleopatra's Needles, in New York and London.

OBELISKS
Pillars like the Washington Monument.
OBELISKS
Certain monuments
OBELISKSPrinters' daggers
OBELISKSStructures like the Washington Monument
OBELISKSTall, tapering stone pillars