Those letters spell thought.
The letters 'tthhoug' unscramble to spell one word.They spell the seven lettered word thought.
There is no anagram. One H was left out, which would then spell hypothesis.
The unscrambled word is Nitrogen.
The letters "nlousacttgirnoa" can be unscrambled to form the word "congratulations."
Communities.
There is no unscrambled word using all of those letters, you can make several 9-letter words though:laetrilesretalliestraillesstrellises
Pepsin.
motorcade
quadrivium
Erosion.
MUSLIN
lathe