swingletree vs whiffletree

swingletree and whiffletree both are nouns.

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

As nouns, swingletree and whiffletree are synonyms defined as:

swingletree and whiffletree: 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 swingletree include whippletree.

swingletree (noun)	whiffletree (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