Welsh Dialects (North vs. South)

I have been learning Cymraeg (South) for a couple of years and have come across several differences is word usage and some structural differences between Northern and Southern Welsh.  There may be some differences, that I am not aware of, between East and West Welsh .  Much like the differences that exist between American and British English.  I have listed below some of the difference I have noticed.  Please share differences in Welsh Dialects that you are aware of.

                  South        North

Like             hoffi          licio

Finish          cwpla        gorffen

With me      gyda fi       geni i

Can (able to) gallu         medru

Want           moyn        eisiau

Milk             llaeth        llefrith

Need           eisiau        angen

Pub            Tafarn         pyb

Fall             cwympo    disgyn

Out             mas          allan

Wake (up)   dihuno       deffro

Away          bant          ffwrdd

Concern (worried)becso  poeni

Return        mynd nol    dychwelyd

Go home    gytre           adre

Now           nawr           rwan

Grandmother  mam-gu    nain

Know          gwbod     gwybod