I'm trying to pinpoint a linguistic concept that may or may not exist.
Let's say you have a complete set of "units" (i.e., sounds/letters/moras) in a language. This can be many things, depending on the language. If the language has an alphabet, this set of units may be the alphabet itself. If there isn't any 1-to-1 mapping between sounds and the alphabet, this set of units may be a set of sounds (i.e., in English, just the letter "a" has multiple readings). It can also be a complete set of sounds (e.g., moras, expressed with Hiragana in Japanese).
You randomly select a reasonable amount of such units and attach them together, forming an artificial "word". Obviously, this artificial "word" may or may not be a real word in that specific language. I believe that the probability of such an artificial word constituting a real word is different across language so language families. If this probability is relatively high, it would mean that a large percentage of "garbled", artificial sounds produced in that language would actually constitute real words.
In that case, the language in question would have a large degree of <the term I am looking for>, e.g., some sort of saturation, perhaps "phonetic saturation"?
I would appreciate any opinions or tips!