Pattern match

[Naser Ali]

Hello,
 
I have an array which was created by slurrping a whole text file. There are
certain element in the array after reading the files which contain only one
word. I want to only match those array elements which contain a single word
and print it. Tried every thing but in vain. I must be doing something
wrong, can any one please suggest the right way of doing this.
 
Thanks