cold-shoulder vs slight

cold-shoulder is not a noun while slight is a noun.

Word	Noun	Adjective	Verb	Adverb
cold-shoulder	No	No	Yes	No
slight	Yes	Yes	Yes	No

As verbs, cold-shoulder and slight are synonyms defined as:

cold-shoulder (noun)	slight (noun)
	a deliberate discourteous act (usually as an expression of anger or disapproval)

cold-shoulder (adjective)	slight (adjective)
	(quantifier used with mass nouns) small in quantity or degree; not much or almost none or (with `a') at least some
	lacking substance or significance
	being of delicate or slender build

cold-shoulder (verb)	slight (verb)
pay no attention to, disrespect	pay no attention to, disrespect