RichThesaurus
inenarrable
vs
inutterable
inenarrable
adj
That cannot be told; indescribable, inexpressible, unspeakable.
inutterable
adj
Unutterable; inexpressible.
How often have the words
inenarrable
and
inutterable
occurred in a corpus of books?
(source:
Google Ngram Viewer
)