cold-shoulder vs ignore

cold-shoulder and ignore both are verbs.

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

As verbs, ignore is a hypernym of cold-shoulder; that is, ignore is a word with a broader meaning than cold-shoulder:

Other hypernyms of cold-shoulder include brush aside, brush off, discount, dismiss, disregard, push aside.

cold-shoulder (verb)	ignore (verb)
pay no attention to, disrespect	be ignorant of or in the dark about
	give little or no attention to
	bar from attention or consideration
	refuse to acknowledge
	fail to notice