Sometimes, too often lately,
Now when my vocabulary
Has grown quite large
I cannot recall a specific word
When no other one will do.

It wisps about my mind
Like butterfly wings
Kissing a blind person.

I can feel it, almost hear it
But I cannot see it much less
Grab hold and pin it down.

So I ignore it, throw my thesaurus
At it if it’s handy hoping to down it
Or ask someone else to grab it
For me and we have a hide & seek
Because I can describe by its relations.

Or, I have to just wait, sometimes a full day,
For it too settle on my index finger
After I have forgottenI even wanted it.

Eventually it comes to me
And tickles my attention
And I say, “Ah, yes! ”

Sheila Burns

http://www.poemhunter.com/poem/writer-s-block-3/