A hodograph is used specifically for measuring wind direction and speed at an altitude.

A graph for displaying wind at various heights. An arrow shows direction and it's length shows wind speed. Each arrow is labelled in accordance with the alititude it represents.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern H-D--R---. That is, nine letter words with 1st letter H and 3rd letter D and 6th letter R. In alphabetical order, they are:

hedgerows

hodiernal

hodograph

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern H-DO---P-. That is, nine letter words with 1st letter H and 3rd letter D and 4th letter O and 8th letter P. In alphabetical order, they are:

hodograph

hodoscope

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 16 words with the pattern -O---R-P-. That is, nine letter words with 2nd letter O and 6th letter R and 8th letter P. In alphabetical order, they are:

bolograph

conscript

copygraph

hodograph

holograph

homograph

ionotropy

logograph

logogriph

monograph

nomograph

polygraph

rotograph

sonograph

tomograph

topograph