I notice that on the main site we have se as a synonym of verbo-pronominal. Although I see that under many circumstance it is true that se is used as part of a pronominal verb that is not universally true. The tag excerpt for se in fact refers to reflexive verbs.
In any case, this can be a good moment to make some ordering on the tags involving these kind of questions, which currently can use many of those without consistency:
I would suggest getting some sample questions, chose which ones should use and then adapt the rest accordingly. We did it in some other situations (¿Qué etiquetas deberíamos utilizar para las preguntas del tipo "Diferencia entre la palabra X y Y"? and ¿Cómo deberíamos etiquetar las preguntas sobre pronombres 'la', 'le' y 'lo' y en las que se observa laísmo, leísmo o loísmo?, for example) and worked well.
Related Meta questions:
I think the tags se and verbo-pronominal should not be synonyms. Se has many uses, and one of them are verbos pronominales. Other uses are impersonal sentences or pasiva refleja. Se itself is an entry in the DPD, so it would make sense as a tag.
Desynonymizing the tags would require some work of retagging the questions that do not refer to pronominal verbs, though. If there is enough support (and some volunteers to help with that work), we can do it.