stuffing box vs packing box

stuffing box and packing box both are nouns.

Word	Noun	Adjective	Verb	Adverb
stuffing box	Yes	No	No	No
packing box	Yes	No	No	No

As nouns, stuffing box and packing box are synonyms defined as:

stuffing box and packing box: a small chamber in which packing is compressed around a reciprocating shaft or piston to form a seal

stuffing box (noun)	packing box (noun)
a small chamber in which packing is compressed around a reciprocating shaft or piston to form a seal	a small chamber in which packing is compressed around a reciprocating shaft or piston to form a seal
	a large crate in which goods are packed for shipment or storage