Noun doesnt have AD infront of it so that is my 2 odd one
A Question that I made

Adventure could be the odd one because it has a different meaning/category than the other words
Noun could be the odd one because it is the only word not starting with "ad"
Adjective could be the odd one because it is the only word with dots ("j" and "i")
unlike all the other words, I can't find a single reason why Adverb would be odd...
for this reason it must be Adverb 0_o
Very similar answer to mine, very nice!! =)
Adventure is not a word class but noun,adverb and adjective is a word class. so adventure is one odd one