whiffletree vs swingletree

whiffletree and swingletree both are nouns.

Word	Noun	Adjective	Verb	Adverb
whiffletree	Yes	No	No	No
swingletree	Yes	No	No	No

As nouns, whiffletree and swingletree are synonyms defined as:

whiffletree and swingletree: a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling

Other synonyms of whiffletree include whippletree.

whiffletree (noun)	swingletree (noun)
a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling	a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling