Summary
A «synonym», «antonym», «homonym», «related», «contex», and «kind-of» Dependency makes sense between two Terms only.
Details
Several Dependencies can belong to a Dictionary and can represent the relationship between Terms:
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«synonym» relates two Terms which have different names but the same meaning
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«antonym» expresses that two Terms have the opposite meaning
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«homonym» relates two Terms which have the same name but a different meaning
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«related» links two Terms which have some semantic connection, but in a less precise way than «synonym»
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«contex» specifies that the meaning of a term is only viable within the context of another term
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«kind-of» relates that a term is a specialization or precision of another term
 
Tips
If you have one of these relationships between elements other than Terms,
you should remove it.