Jidda vs Jeddah

Jidda and Jeddah both are nouns.

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

As nouns, Jidda and Jeddah are synonyms defined as:

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

Other synonyms of Jidda include Jed'dah, Jiddah.

Jidda (noun)	Jeddah (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