The letters do not spell any 6 letter words. They can be used to spell the 5 letter words antas (a pilaster formed at the termination of a wall), nadas (nothing) and stand.
Sinkage is the seven letter word formed using the letters aeigkns.
Librarian is a 9 letter word that has letters BRAIN in it.
8 different 4-letter words can be formed from the letters of the word "Nation".
discant
panther
monitor
cantdogcoagentcognatecommandcommendcommentcongaeddecagondogfacefagotedmagnetomegatonmetonymmomentamontagetacnodetangoed
char
savages
coacted
stuck
Moccasin.