disregard vs brush aside

disregard is a noun but brush aside is not a noun.

Word	Noun	Adjective	Verb	Adverb
disregard	Yes	No	Yes	No
brush aside	No	No	Yes	No

As verbs, disregard and brush aside are synonyms defined as:

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

disregard (noun)	brush aside (noun)
willful lack of care and attention
lack of attention and due care

disregard (verb)	brush aside (verb)
give little or no attention to	bar from attention or consideration
bar from attention or consideration
refuse to acknowledge