spotless vs spick-and-span

spotless and spick-and-span both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spotless	No	Yes	No	No
spick-and-span	No	Yes	No	No

As adjectives, spotless and spick-and-span are synonyms defined as:

Other synonyms of spotless include immaculate, speckless, spic-and-span, spic, spick.

spotless (adjective)	spick-and-span (adjective)
completely neat and clean	completely neat and clean
	conspicuously new