No matter it is a homophone (phonogram) or a polysemous word, the point of the speaker is not the "similarity" but the equivocality.

不(谐)音还词，说话人要表达重点不在“”上在歧上。

The rhetorical device-pun intentionally uses homophone (phonogram) and polysemous words which can possible generate equivocality in order to punningly express what the speaker is really driving at.

双关辞格有意利用(谐)音词与一词词可能引起歧来达到一语双关地表述说活人真实意图目.