Dialect - The different ways in which a language is spoken (differences are in lexis, grammar and phonology). Sometimes different words may be used in place of the dictionary-correct version. For example, Northern people may say 'mam' or 'ma' instead of 'mum' or 'mother'.

Accent - only to do with sound differences. How phonemes sound different, depending on geographic. For example, Northern accents may cause the word 'my' to sound like 'me'.