Only words that do not include a capital, number, dash, or period:

while (<>)
{ print if /^[^A-Z0-9.-]+$/; }
[download]

the only problem with that is that the lines that I want to include have only 1 thing different than the words I want:
They are all lower case
...so I didn't think you could use lower case to sort the words.
But by all means feel free to prove me wrong.
Creating chaos out of order.

Only lower case:

while (<>)
{ print if /^[a-z]+$/; }
[download]

-QM
--
Quantum Mechanics: The dreams stuff is made of

I really don't understand what you mean by:

the only problem with that is that the lines that I want to include have only 1 thing different than the words I want

Could you please rephrase it? Also, you should really do what QM suggests, and read perlre, or even perlretut. They really do help, and it doesn't look like you have read either yet.