prominent vs spectacular

prominent is not a noun while spectacular is a noun.

Word	Noun	Adjective	Verb	Adverb
prominent	No	Yes	No	No
spectacular	Yes	Yes	No	No

As adjectives, prominent and spectacular are synonyms defined as:

prominent and spectacular: having a quality that thrusts itself into attention

Other synonyms of prominent include outstanding, salient, striking.

prominent (noun)	spectacular (noun)
	a lavishly produced performance

prominent (adjective)	spectacular (adjective)
having a quality that thrusts itself into attention	having a quality that thrusts itself into attention
conspicuous in position or importance	characteristic of spectacles or drama
	sensational in appearance or thrilling in effect