Why are headwords in some dictionaries, such as Oxford's, hyphenated? It doesn't seem to break words down into morphemes (hyp-no-tize only has two morphemes) or into syllables (eas-ily has three syllables).
In the context of the online Oxford Dictionaries, the following is provided as part of the Guide to Dictionary Entries:
The usual spelling of a word is given as the headword at the top of its entry. If there are also common variant spellings of a word, these are given underneath. Where a plural form is irregular (i.e. it does not end with -s), this is also given underneath.
In the British & World English dictionary most words have line break information included, showing editors where best to break these words at the end of lines. In the US English dictionary syllabification information is given.
Often, in the case of physical dictionaries, a guide to the structure of entries will be found towards the beginning of the dictionary.