Would you give me and example in which they are interchangeable? or We can never use them instead of each other in pied-piping?

@MARamezani ok. the reference of "transitive not in passive" is Longman English Dictionary not me. I know what Passive is too! If you want help anyone do not rush and do not underrate him/his. Comport the others like what Stoney B. did and get the perfect answer. thank you.

I think it's not rare. it is NEVER used in passive form. transitive not in passive

I didn't find any passive example there. Did you?? Do you know the difference between "passive" and "past participle"?

Are you sure that "undergo" has passive form as well??? give me an example.

What do you mean? Have you ever read my question?