Most common is "OY !", from the Hebrew "HOY !".
Essentially interjections and exclamations are the same thing. They are both parts of speech that exemplify some type of sudden emotion. Interjections are typically only a word or two long, while exclamations can be a sentence; basically, an interjection is simply a subcategory of exclamations. Some common interjections/exclamations include alas, oh (dear/boy/my), uh, well, no duh, and so on.
Aha!
amen
Dinner is ready, don't do that, drop your weapon and duck are exclamations. They begin with the letter d.
Dismay is accented on the second syllable.
The past tense of dismay is dismayed.
"Dismay" is a noun, such as in the sentence "The girl was in dismay when she found out her favorite doll had been lost."
Lookout
Zap!
It was with dismay that I saw my broken car window.
No, dismay is a feeling and to moan is to make a sound.