Learn English – Word for referring to incomprehensible sounds produced by stuttering/stammering

Verisimilitude means "the quality of sounding true." So if you wanted to be very pretentious and formal about it you could say something like "verisimilitude by euphony."

(This example was recursive. :) )

There is no physiological term for this phenomenon. If you don't believe me, please read this.

Salivation is an active process, as is lacrimation. Rhinorrhea (a runny nose) has no active verb either; the nose isn't mucorating, rhinorunning, or anything else. There is excess mucous production and gravity does the rest.

Similarly, the vasodilation and subsequent transudation of fluids in the vagina has no active verb. Nor does the tumescence of the penis (it's not "erecting".)**

There are slang words for these processes, but they are not akin to "salivation."

There aren't single words for everything under the sun.

Edited to add I was wrong. Tumesce is a verb. HT to @Frank.