Yeah - when you use the new google keyword tool checker, click on 'previous interface' up to the top right hand side. One the old interface, unclick synonyms and then paste your keywords in a list in the box. The figures won't match up exactly to the new keyword checker, but they are close enough.
Proably do batches of 100 - so your portfolio of 21000+ will take a little while but a lot faster thane the new checker.
hth, Luke