Jiddah vs Jidda

Jiddah and Jidda both are nouns.

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

As nouns, Jiddah and Jidda are synonyms defined as:

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

Other synonyms of Jiddah include Jed'dah, Jeddah.

Jiddah (noun)	Jidda (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