STUMPERS V

1. Can you think of two common five-letter words such that moving the last letter of the first word and making it the first letter, gives you the second word. And moving the first letter of the second word and making it the last letter, gives you the first word?

2. Can you think of a six-letter, one-syllable word such that dropping the first two letters gives you a four-letter, two-syllable word?

3. Switch the two middle letters of a six-letter word to get a word that is its opposite.

HINTS:
1. The consecutive letters ART can be found in both words.
2. Both words describe medical conditions, but the first one is much, much worse than the second.
3. One of the words means together.

Answers:

1. The words are EARTH and HEART. 
2. The words are PLAGUE and AGUE. 
3. UNITED - UNTIED