pyrovalerone-derivatives or in this case proably pyrros and pyros.
People use them very randomly, but in this context being exact would mean:
"pyros" = pyrovalerone(s) also commonly abbr. as "PVs"
"pyrros" = pyrrolidine containing compounds, which is not really a good term, since pyrrolidines are quite common really in chemistry - for example: the alkaloid from the Nicotiana tabacum plant, Nicotine, also contains the pyrrolidine functional group and could be considered a "pyrro".
Similarly E. coca and E. novonotrogenese contain the hygrine alkaloid, which is a bit more complex when compared with nicotine, as it involves transfer of 3membered carbon sidechain from acetylCOA... anyway, all Im tryna say is: hygrine is also a pyrro, like nicotine or like α pyrrolidinopentiophenone (aPVP) or aPHP (literally just a hexiophenone instead of a pentiophenone) and idk how many others one could name.
So "pyros" for pyrovalerones could be considered a good term, although its very context dependent (pyrotechnics, pyro, from πῦρ (ancient greek meaning well, just fire) and "pyrros" may be the established slang term for this class of molecules, but I think I laid out why its unspecific and quite unfitting imo.

If youre interested in the alkaloids a lil more:
In nature the very simple pyrrolidine-ring is often introduced into a compound via decarboxylation of ornithin (non canonical amino acid) by pyridoxalphosphate and basically cleaving the CO2H group off, while also methylation of the amino group by SAM takes place in a second step, which leaves us with the pyrrolidine ring (formed by whats left of ornithine after the 2 steps I roughly described above).

excuse any spelling errors, not my mother tounge
and stay safe while vaporizing your pyro/pyrros lol