Gomorrha = "submersion"
1) a city in eastern part of Judah that was destroyed when the Lord rained fire and brimstone on it; now covered by the Dead Sea
Part of Speech: noun proper locative
now covered by the Dead Sea
Of Hebrew origin [H6017]; Gomorrha (that is, Amorah), a place near the Dead Sea: - Gomorrha.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root Γόμορρα; click on the second column to search for that grammatical form of the root Γόμορρα; click on the third column to search for that word and grammatical form; click on the total to search for the root Γόμορρα.