ignore vs disregard

ignore is not a noun while disregard is a noun.

Word	Noun	Adjective	Verb	Adverb
ignore	No	No	Yes	No
disregard	Yes	No	Yes	No

As verbs, ignore and disregard are synonyms defined as:

Other synonyms of ignore include neglect.

As verbs, ignore and disregard are synonyms defined as:

Other synonyms of ignore include brush aside, brush off, discount, dismiss, push aside.

As verbs, ignore and disregard are synonyms defined as:

Other synonyms of ignore include cut, snub.

ignore (noun)	disregard (noun)
	willful lack of care and attention
	lack of attention and due care

ignore (verb)	disregard (verb)
be ignorant of or in the dark about	give little or no attention to
give little or no attention to	bar from attention or consideration
bar from attention or consideration	refuse to acknowledge
refuse to acknowledge
fail to notice