total
ately$
^b.*ifically
^(a|b)[o-z]+$
Note ^ and $ for beginning and end..*(e.*){5,}
q[^u]
.*([a-z])\1.*([a-z])\2.*([a-z])\3.*([a-z])\4.*
.*([a-z]{3}).*\1.*\1.*
^f(?=\\w*?a)(?=\\w*?e)(?=\\w*?i)(?=\\w*?o)(?=\\w*?u)[a-z]+
It uses the lookahead assertion (?=)
and non-greedy matching \w*?"
. There are a surprisingly large number of words containing all vowels, including words starting with every letter except y in the Base dictionary, and all letters in Union.(?=.*e)^[eginpux]{4,}$
find words of four or more letters from [eginpux] that contain "e". See NYT Spelling Bee.