Display?
I'm pretty sure that the answer is DRIFTS. You can get drifts of blooms.
If you mean literally, then it usually means a planting over an area of one particular type of flower ( more often than not, annuals)Species suitable for this would be pansies, petunias, dianthus, roses, bulbs, marigolds, poppies, cinerarias, impatiens, phlox, salvias, snapdragon, stocks.
Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.Hoplites were soldiers who fought in an early type of massed-lined warfare.
Mast
Steel
cold and warm air
Both are used, but "massed choir" removes the confusion with a choir singing a mass.
Massed artillery.
They were massed produced
massed practice
The word that you are looking for is 'Shoah'.
Conventional, massed armies, massed warships. The 1860's Japanese Army was trained by the French, later the Germans. The 1860s navy was trained by Great Britain.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 10 words with the pattern MAS-E-. That is, six letter words with 1st letter M and 2nd letter A and 3rd letter S and 5th letter E. In alphabetical order, they are: mashed masher mashes masked maskeg masker massed masses masted master