As nouns the difference between hed and flock
is that
hed is (journalism|slang) the headline of a news story while
flock is a large number of birds, especially those gathered together for the purpose of migration or
flock can be coarse tufts of wool or cotton used in bedding.
As a verb flock is
to congregate in or head towards a place in large numbers or
flock can be to coat a surface with dense fibers or particles.