Lookup the dictionary with wildcards
From the command line you can use look which looks for the string as a prefix of a word in the file- /usr/share/dict/words.

look ent


Right click the word in the Terminal window and select Look Up "....." menu or you can grep /usr/share/dict/words using regular expressions or extended regular expressions. Such as:

grep 'hello$' /usr/share/dict/words