It is a fever that recurs after an interval of five days

There are so many words ending with tan like:

1) tartan

2) suntan

3) sultan

4) sextan

5) rattan

6) platan

7) partan

8) caftan

9) kaftan

10) captan

Any constellation is a group of stars that appear to form some kind of pattern,

but have no connection with each other. They all happen to be in roughly the

same direction from us, but they're all at different distances. So there's no

such thing as a constellation's distance from us.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern --X-AN. That is, six letter words with 3rd letter X and 5th letter A and 6th letter N. In alphabetical order, they are:

sextan

taxman

Charlatan

Harmattan

Manhattan

Mercaptan

Orangutan

Protistan

Sacristan

Samaritan

Insectan

Rambutan

Tarlatan

Tarletan

Capstan

Habitan

Puritan

Quartan

Quintan

Shaitan

Sheitan

Spartan

Triptan

Caftan

Captan

Kaftan

Partan

Platan

Rattan

Seitan

Sextan

Sultan

Suntan

Tartan

Cotan

Octan

Ratan

Titan

Witan