Synonyms for Douglas hemlock:

n.

Douglas Hemlock (noun)
Douglas Pine, Oregon Pine, Douglas Spruce, Oregon Fir, Pseudotsuga Menziesii, Green Douglas Fir.

Other synonyms:

Oregon fir
Oregon Fir.
Oregon pine
Oregon Pine.
Pseudotsuga menziesii
Pseudotsuga Menziesii.
douglas pine
Douglas Pine.
douglas spruce
Douglas Spruce.
green douglas fir
Green Douglas Fir.