I have started trying to expand my vocabulary.... Up until recently I have just been trying to get used to Russian and its' grammar...
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Ощущение - ощущения ---- cобытие -события

Just a quick question about these words:

1) So with such words, the singular is is -ие and the plural is -ия, right? Is this quite common, what are some other examples?

2) I cannot really hear a difference; when people pronounce it, it sounds the same in both the singular and plural.... I hear the "ie" ending for both.. Do you agree or am I not hearing it right?