
1) Cloud
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https://www.crosswordclues.com/clue/thunderhead

1) Roller coaster in Tennessee
Found on
https://www.crosswordclues.com/clue/thunderhead

Thunderhead can refer to: Other meanings: ...
Found on
http://en.wikipedia.org/wiki/Thunderhead
[I Just Wanted A Little Rain] ...
Found on
http://en.wikipedia.org/wiki/Thunderhead_(I_Just_Wanted_A_Little_Rain)
[roller coaster] Thunderhead is a wooden roller coaster located at Dollywood in Pigeon Forge, Tennessee. The coaster, which was the anchor attraction of the new `Thunderhead Gap` section, opened on April 3, 2004, to much critical acclaim. Thunderhead boasts 22 turns and 32 crossovers , and utilizes GCI`s Millennium Flyer trains, used on all...
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http://en.wikipedia.org/wiki/Thunderhead_(roller_coaster)

• (n.) A rounded mass of cloud, with shining white edges; a cumulus, -- often appearing before a thunderstorm.
Found on
http://thinkexist.com/dictionary/meaning/thunderhead/
Thun'der·head` noun A rounded mass of cloud, with shining white edges; a cumulus, -- often appearing before a thunderstorm.
Found on
http://www.encyclo.co.uk/webster/T/52
noun a rounded projecting mass of a cumulus cloud with shining edges; often appears before a thunderstorm
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.