A colloquial word is an informal word relating to the spoken language or something like a slang. Examples are ‘ain’t’ and ‘gonna’.

Metrosexual for example is coined word. It recently came into our language to mean a ‘stylish straight man’

Hippy is another one to refer to the Hippies of the 70’s.

Shakespeare coined many words such as eyeball.

Coined words also come from products.. such as Slinky.

iPhone.. coined e.t.c

Colloquial words are slang words:

Today commonly “shorty, bling… etc”

I think you may be able to find the difference =]

Colloquial words are informal, common everyday words, sometimes used regionally. Words such as “ain’t” or maybe “kids” instead of “children”.