Uncommon words

So uncommon, you didn't even know they existed and once you see them, you still won't believe.
maritorious excessively fond of one's husband - see uxorious (excessively fond of one's wife)
misfortunate unfortunate 
disinformation intentional dissemination of false information
misandry prejudice against men - see misogyny 
sistren plural of sister - ah, i was looking for a female counterpart to brethren. by the way, it's obsolete or dialectal, so...