Actual companionship means the word that motivates the altered expression is explicitly present in the discourse. The hearer can observe both occurrences and understand that the second expression has been chosen to correspond with the first.
If ṭabkh first means literally cooking food, and the preparation of clothing is then called ṭabkh in the same exchange, the second usage is generated by the actual presence of the first.
The relation is not merely an external analogy between activities. The presence of the expression in the conversation makes the choice of wording rhetorically intelligible.