slop jar vs slop pail

slop jar and slop pail both are nouns.

Word	Noun	Adjective	Verb	Adverb
slop jar	Yes	No	No	No
slop pail	Yes	No	No	No

As nouns, slop jar and slop pail are synonyms defined as:

slop jar and slop pail: a large pail used to receive waste water from a washbasin or chamber pot

slop jar (noun)	slop pail (noun)
a large pail used to receive waste water from a washbasin or chamber pot	a large pail used to receive waste water from a washbasin or chamber pot