Those letters will spell the nine letter word: moderator
You've given us seven letters. That's "airport."
The longest word that I can identify is the 6 letter word rotate.
Orator
Sinkage is the seven letter word formed using the letters aeigkns.
Seven letter words that can be made from those letters are shutter and stretch.
The seven letters, mcuanst, can be formed into the seven letter word, sanctum. Sanctum is an English word meaning 'a sacred place.'
discant
panther
monitor
cantdogcoagentcognatecommandcommendcommentcongaeddecagondogfacefagotedmagnetomegatonmetonymmomentamontagetacnodetangoed
coacted
alunite, ventail
burnout, outburn
grandest
There are no seven letter words from these letters.