There is no seven letter word spelled with the letters DDNNIIA.
Words that can be spelled with those letters are:
Romantic is the word.
lisle
ducat.
Inept
discount
The word is angry.
Norwich
tryinsud = industry
dauct
g l i n b s i s:Siblings would be the word for the jumbled letters.
The jumbled word in "Monday" could be "Dynamo." If you meant to ask for an anagram or another rearrangement, please clarify!
The word is whole.