discredit vs dismiss

discredit is a noun but dismiss is not a noun.

Word	Noun	Adjective	Verb	Adverb
discredit	Yes	No	Yes	No
dismiss	No	No	Yes	No

As verbs, dismiss is a hypernym of discredit; that is, dismiss is a word with a broader meaning than discredit:

Other hypernyms of discredit include brush aside, brush off, discount, disregard, ignore, push aside.

discredit (noun)	dismiss (noun)
the state of being held in low esteem

discredit (verb)	dismiss (verb)
reject as false; refuse to accept	declare void
cause to be distrusted or disbelieved	bar from attention or consideration
damage the reputation of	end one's encounter with somebody by causing or permitting the person to leave
	cease to consider; put out of judicial consideration
	terminate the employment of; discharge from an office or position
	stop associating with