Words-boon or bane? (Work in progress)

Humans are considered to be superior to animals- one of the reasons being their ability to speak- express their feelings and thoughts through speech. But instead of making things simple, the same ability to speak/communicate often times has been the reason for the rift in many human relationships. Why is it that when we have so many words to communicate that we require a dictionary for definition, we still cannot express clearly what we really feel or intend to say?
It should be easy for us to convey our message to another human being because we have several words that mean the same thing or synonyms as we call it and we should have been able to say it in different ways. On the contrary, we tangle each other in the web of words, beat around the bush when we try to convey our simplest emotions of love or even despair. The simplest the emotion, the hardest it is to communicate through words.