I don't know any Tajik homonym.

In Russian, the words for "caress, endearment" and "least weasel" are homonymous and possibly related etymologically.

In English "blue" and "blew" are homonyms.

A great motivation for keeping sinograms in Oriental languages is to distinguish the multitude of homonyms.

A good example of homonyms in Portuguese are the words "sessão", "seção" and "cessão".

Some hippie writers invented the idea of a drug called "adrenochrome" which does not actually exist, but is homonymous with a non-psychoactive pigment.