Saigon vs Ho Chi Minh City

Saigon and Ho Chi Minh City both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saigon	Yes	No	No	No
Ho Chi Minh City	Yes	No	No	No

As nouns, Saigon and Ho Chi Minh City are synonyms defined as:

Saigon and Ho Chi Minh City: a city in South Vietnam; formerly (as Saigon) it was the capital of French Indochina

Saigon (noun)	Ho Chi Minh City (noun)
a city in South Vietnam; formerly (as Saigon) it was the capital of French Indochina	a city in South Vietnam; formerly (as Saigon) it was the capital of French Indochina