As nouns the difference between gumminess and gemminess
is that gumminess is the state or condition of being gummy while gemminess is (uk|slang|archaic) the state or quality of being gemmy; spruceness; smartness.
gumminess
English
Noun
(-)
The state or condition of being gummy.
gemminess
English
Alternative forms
* jemminess
Noun
(
-)
(UK, slang, archaic) The state or quality of being gemmy; spruceness; smartness.
-
(
Webster 1913)