malcontent vs sorehead

malcontent and sorehead both are nouns.

Word	Noun	Adjective	Verb	Adverb
malcontent	Yes	Yes	No	No
sorehead	Yes	No	No	No

As nouns, sorehead is a hyponym of malcontent; that is, sorehead is a word with a more specific, narrower meaning than malcontent:

Other hyponyms of malcontent include caviler, caviller, pettifogger, quibbler, squabbler.

malcontent (noun)	sorehead (noun)
a person who is discontented or disgusted	someone who is peevish or disgruntled

malcontent (adjective)	sorehead (adjective)
discontented as toward authority