swingletree vs whippletree

swingletree and whippletree both are nouns.

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

As nouns, swingletree and whippletree are synonyms defined as:

swingletree and whippletree: 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 whiffletree.

swingletree (noun)	whippletree (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