The answer is
...
rapture
Well, in the OED it's "rardess". Your dictionary may vary.
Extreme
if you look in the dictionary the answer is consul
Thousands of five letter words appear in the dictionary prior to hint. Aaron is the "first" five letter word in the dictionary.
"Daffodil" comes before "daisy" in the dictionary.
"Care" comes before "careful" in the dictionary because the words are listed alphabetically, and "C" comes before "CA."
maybe
if you look up the dictionary the word that comes after rash is rasher.
Words in the dictionary are arranged alphabetically. Because all three of these words share the first three letters "uni-", we must look at the fourth letter. The fourth letter of "unicorn" is "c", and the fourth letter of "union" is "o". Since "c" comes before "f" and "o" comes after, the word "union" will come after "uniform" in the dictionary.
Signal
liner
ready
sneet
In the dictionary, maybe comes before maypole.The dictionary lists words in alphabetical order and the b in maybe comes before the p in maypole.If a dictionary lists 'matbe' as a word, it would come before 'maypole', because 'mat..' comes before 'may...'(But 'matbe' isn't a word. Well, not yet it isn't. But, of course, sometime in the future it matbe!)If the intention was to ask: "In the dictionary, which comes first: 'maybe' or 'maypole'?", then see Related questionsbelow.