Here is a very useful tool for Pali learners:
Kurt Schmidt: A Frequency Dictionary of Pali: Core Vocabulary for Learnershttp://www.amazon.com/Frequency-Diction ... =8-1-spell
A customer review at the Amazon site says:
This is an interesting comprehensive Pali dictionary. The author's idea to select Pali vocabulary by frequency and only focus on canonical Pali (it seems to be mostly Sutta Pitaka Pali) makes sense. It gives someone who starts learning Pali a clue as to which words he see most often.
I especially liked the combination of word definition with sample sentences (all of which are real extracts from the Suttas and very short full sentences to see the word in its proper context).
At the end of the book there is an index, which is critical to find words.
All in all a very nice edition of core (fundamental) Pali vocabulary.