protofugality 

https://doi.org/10.1351/goldbook.08197
Special case of nucleofugality, describing the relative rates of transfer of a proton (more generally: hydron) from a series of Brønsted acids HX to a common Brønsted base.
Note:
This term has the advantage over the commonly used "kinetic acidity" that philicity and fugality are associated with kinetics, while acidity and basicity are associated with thermodynamics.
See also: protophilicity
Source:
PAC, 2022, 94, 353. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)) on page 487 [Terms] [Paper]