Question

onomatopoeic word of aeroplane and of horn in single word don't copy it from any other apps
please​

Answer 1

The sound of an aeroplane can be conveniently separated into two parts ; a hum, and the unmusical remainder which may be called a roar. The sepa- ration is rather arbitrary, as the two are usually observed simultaneously ; but it appears justified by the fact that the hum can be definitely traced to the exhaust.

Onomatopoeic word for horn is honk.