son-father relations, we need to make this kind of relationship stronger here are some examples to differentiate between the two words : relation Examples teacher-pupil relations Relations with neighbouring countries are under strain at present. ............................. Relationship Examples The relationship between the police and the local community has improved. She has a very close relationship with her sister. I have established a good working relationship with my boss. a master-servant relationship source : Oxford Advanced Learner's Dictionary

A relationship = the sense of being related and usually applies to people. However, the concept of a relationship can be abstracted to all things, and results in the follow distinction between the two terms: A relation is a concept relating two things. A relationship is a conception of a relation.

The dude had a relationship with a girl with his same last name, but thankfully there was no blood relation. :P