How would differentiate between 'accent' and 'pronunciation' in simple words? Don't 'accent' and 'pronunciation' overlap each other to much extent? Doesn't pronunciation also vary with a different accent?

Please guide me. Thanks.
Hi Jackson;

To me, pronunciation applies to a single word. It is the sounds, tones, and relative emphasis on certain parts (syllables) of the word when it is spoken.

An accent is a pattern of speaking a language that is characteristic of a group of people. e.g. He speaks with a southern accent.

Certainly pronunciation can change with accent. The British pronounce some words differently than Americans. These are two with particularly striking differences:

- tomato
- aluminum
Jackson6612 Someone once told me that it could be really difficult to learn to speak in English accent but American is easy because it doesn't have that arrogant feel to it.
There are a lot of very different accents in the UK. You can't really say what English sounds like if you don't specify the accent you are talking about.

The words "accent" and "dialect" are often misused, as far as I know, and I'm not sure what their exact meanings are supposed to be. You might want to take a look at some articles on Wikipedia, and see if you can find any information on how they are used in the linguistics field.
I think that "dialect" refers to a variety of a language (ex: Californian English is a dialect of English), and includes regional vocabulary, grammar, and an "accent". So I think the accent just refers to the phonology of a dialect, that is, pronunciation of words, how words are connected, vowel or consonant reductions in fast speech, intonation, sometimes maybe even voice quality, etc.
The word "pronunciation" is just a generic term, in my opinion. To me, pronunciation mainly refers to the process of producing sounds with your mouth, and I think that might be the reason why it is also used in the ESL field instead of the word "accent" (ex: improve your pronunciation = learn to produce the right sounds = get rid of your foreign accent).
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Thanks a lot, Alphecca.

But isn't then accent also about sounds? Or, does it also include vocabulary peculiar to a place? How would define 'accent' as compared to 'pronunciation'? I personally find American more straightforward than the English. Someone once told me that it could be really difficult to learn to speak in English accent but American is easy because it doesn't have that arrogant feel to it. Please, mind it that that "arrogant feel" part is not mine.

Please guide me.
 Kooyeen's reply was promoted to an answer.
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I agree Kooyeen. My example was a gross oversimplification. Dialects are natural to all languages. Dialects are formed when a local community of speakers develops their own unique way of speaking a language. I lived in The Netherlands for a while - the natives could tell exactly what region or city a person was from by the way they spoke. The dialects in the British Isles are very distinctive, too. The pronunciation, grammar, semantics all can be variations from the mother tongue.
Dialects, if left unchecked, naturally evolve to be unique languages - for example, the Romance languages probably originated as dialects of Latin. English and Dutch originated as dialects of low country German. They were mutually comprehensible, and then, at some point had diverged so much that that was no longer true.

Accent is speaking the same words and grammar, but with different intonation (e.g. English spoken with a French accent has more of a nasal quality.) Accent is also used for the syllable of a word that receives more stress. Dictionary.com has a good definition of the terms.
What do you notice when you utter a single sound? Pronunciation, pitch and pitch contour. If you take any singing/voice lessons, they ask you to "humm" on various tunes. This aspect is accent; the position of articulators, etc is another one that is dealt in pronunciaton books.