yard donkey vs yarder

yard donkey and yarder both are nouns.

Word	Noun	Adjective	Verb	Adverb
yard donkey	Yes	No	No	No
yarder	Yes	No	No	No

As nouns, yard donkey and yarder are synonyms defined as:

yard donkey and yarder: a winch (or system of winches) powered by an engine and used to haul logs from a stump to a landing or to a skid road

yard donkey (noun)	yarder (noun)
a winch (or system of winches) powered by an engine and used to haul logs from a stump to a landing or to a skid road	a winch (or system of winches) powered by an engine and used to haul logs from a stump to a landing or to a skid road
	(used only in combinations) the height or length of something in yards