spick vs speckless

spick is a noun but speckless is not a noun.

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

As adjectives, spick and speckless are synonyms defined as:

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

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

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