There are many ways to spell the "ooh" sound. You can spell it oh, or uh. This depends on exactly what sound it is making.
you have a leak in the exhaust system lets in air
Sound of electricity
A howling sound
well sound i out "occurs" but you spell it occurs
peacock sound is called scream
klingen
Arggh
The sound of a ship is usually spelled as "ship." If you are looking for an onomatopoeic representation of the sound of a ship, it is often described as "whoosh" or "swish" as it moves through the water.
backfire is the best! rubbish! loosers L
The whispering sound is typically spelled as "whisper."
Professor Lochart's spell backfired because he made a mistake in the incantation or the casting process. It may have been due to a mispronunciation or misunderstanding of the spell's requirements. Alternatively, there could have been an unforeseen complication or interference in the spell's magical energies.