serious questions

[rafikhammad]

why do we say killer whale and not killing whale
?forty million people has
why has not have

[mrmoha]

killing is a gerund (noun
people here means اناس
has describes million

[Mr. Medhat Salah]

مشكوووووووووووووووووووووور

[مستر محمود عبد العاطى]

killing is a gerund but killer is a noun
people is an adjective not a subject

[yasser el atriby]

if we say killing whale it means the act of killing the whale but when we want to describe a kind of whales we say killer.which is an adjective.