AwAw
The polar bear makes a 'Growl' sound
The noise a bear makes is typically spelled as "roar" or "growl."
The sound a flute makes is typically spelled as "whistle" or "flutey."
rowr!
The sound a penguin makes is typically spelled "hok hok" or "bray."
Varooooom
The sound a buzzer makes when the answer is wrong is typically spelled as "bzzz" or "buzz."
The sound a goat makes is typically spelled "maa" or "bleat."
Ka-ching!
Unnh!
vroom
The typical written expression for a yawn sound is "ho hum."