spic vs spick-and-span

spic is a noun but spick-and-span is not a noun.

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

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

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

spic (noun)	spick-and-span (noun)
(ethnic slur) offensive term for persons of Latin American descent

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