im•pru•dent

Pronunciation: (im-prOOd'nt),  
—adj. 
not prudent; lacking discretion; incautious; rash.

DISEASE : SICKNESS :: _____ : honest (truthful)

The best answer is truthful. The relationship between the first pair of words, disease and sickness, is that of synonyms—words that have similar meanings. Therefore, the second pair of words must also be synonyms. Truthful is a synonym for honest.

pol•y•glot Pronunciation: (pol'E-glot), [key] 
—adj. 
1. able to speak or write several languages; multilingual. 
2. containing, composed of, or written in several languages: a polyglot Bible. 

—n. 
1. a mixture or confusion of languages. 
2. a person who speaks, writes, or reads a number of languages. 
3. a book, esp. a Bible, containing the same text in several languages. 

FURIOUS : ANGRY :: _____ : purse

The best answer is pocketbook. The relationship between the first pair of words, furious and angry, is that of synonyms—words that have similar meanings. Therefore, the second pair of words must also be synonyms. Pocketbook is a synonym for purse.