emblem vs symbolization

emblem and symbolization both are nouns.

Word	Noun	Adjective	Verb	Adverb
emblem	Yes	No	No	No
symbolization	Yes	No	No	No

As nouns, symbolization is a hypernym of emblem; that is, symbolization is a word with a broader meaning than emblem:

emblem: a visible symbol representing an abstract idea
symbolization: something visible that by association or convention represents something else that is invisible

Other hypernyms of emblem include symbol, symbolic representation, symbolisation.

emblem (noun)	symbolization (noun)
special design or visual object representing a quality, type, group, etc.	the practice of investing things with symbolic meaning
a visible symbol representing an abstract idea	something visible that by association or convention represents something else that is invisible
	the use of symbols to convey meaning