As a proper noun browning
is .
As a noun dieback is
(biology) the browning and death of a plant shoot starting at the tip, due to either disease or climate conditions.
browning
English
Verb
(head)
Noun
(
en noun)
The act or operation of giving a brown colour, as to gun barrels, etc.
(masonry) A smooth coat of brown mortar, usually the second coat, and the preparation for the finishing coat of plaster.
dieback
English
Noun
(
en noun)
(biology) The browning and death of a plant shoot starting at the tip, due to either disease or climate conditions