spick vs spotless

spick is a noun but spotless is not a noun.

Word	Noun	Adjective	Verb	Adverb
spick	Yes	Yes	No	No
spotless	No	Yes	No	No

As adjectives, spick and spotless are synonyms defined as:

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

spick (noun)	spotless (noun)
(ethnic slur) offensive term for persons of Latin American descent

spick (adjective)	spotless (adjective)
completely neat and clean	completely neat and clean