Answer: sinuses

AnswerCrossword Clue
SINUSESHoles in the head?
sinusesAn irregular venous or lymphatic cavity, reservoir, or dilated vessel
sinusesA rounded notch between two lobes on the margin of a leaf or petal
sinusesRelating to or denoting the sinoatrial node of the heart or its function as a pacemaker
sinusesSINUS, a cranial cavity
sinusesA cavity within a bone or other tissue, esp. one in the bones of the face or skull connecting with the nasal cavities
sinusesAn infected tract leading from a deep-seated infection and discharging pus to the surface
SINUSESNasal spray targets
SINUSESSites of congestion
SINUSESHoles in your head
SINUSESBodily cavities
SINUSESThey may be blocked
SINUSESThey're often sensitive to allergens
SINUSESCommonly congested cavities
SINUSESAllergies may congest them
SINUSESThey may be blocked in the winter
SINUSESThey may be cleared with a spray
SINUSESAllergies often affect them
SINUSESHoles in the head
SINUSESCavities
SINUSESAir cavities in the head.
SINUSESCavities of the skull.
SINUSESCold victims?
SINUSESCavities that dentists don't fill