Marsh ~
a tract of low wet land, characterized by grasses, sedges, cattails, and rushes.
Symbiotic ~
mutually beneficial
Shack ~
a rough cabin, hut
Scarlet ~
a bright-red colour inclining toward orange.
Stately ~
majestic; imposing in magnificence, elegance, etc
Joining Paula with her five choices Pick a Word for October
PoetryPix 
The aqueduct frames the little ships with grace
Brunel would like to know that!