tumbril vs tumbrel

tumbril and tumbrel both are nouns.

Word	Noun	Adjective	Verb	Adverb
tumbril	Yes	No	No	No
tumbrel	Yes	No	No	No

As nouns, tumbril and tumbrel are synonyms defined as:

tumbril and tumbrel: a farm dumpcart for carrying dung; carts of this type were used to carry prisoners to the guillotine during the French Revolution

tumbril (noun)	tumbrel (noun)
a farm dumpcart for carrying dung; carts of this type were used to carry prisoners to the guillotine during the French Revolution	a farm dumpcart for carrying dung; carts of this type were used to carry prisoners to the guillotine during the French Revolution