Jeddah vs Jiddah

Jeddah and Jiddah both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jeddah	Yes	No	No	No
Jiddah	Yes	No	No	No

As nouns, Jeddah and Jiddah are synonyms defined as:

Jeddah and Jiddah: port city in western Saudi Arabia on the Red Sea; near Mecca

Other synonyms of Jeddah include Jed'dah, Jidda.

Jeddah (noun)	Jiddah (noun)
port city in western Saudi Arabia on the Red Sea; near Mecca	port city in western Saudi Arabia on the Red Sea; near Mecca