pepper shaker vs pepper box

pepper shaker and pepper box both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepper shaker	Yes	No	No	No
pepper box	Yes	No	No	No

As nouns, pepper shaker and pepper box are synonyms defined as:

pepper shaker and pepper box: a shaker with a perforated top for sprinkling ground pepper

Other synonyms of pepper shaker include pepper pot.

pepper shaker (noun)	pepper box (noun)
a shaker with a perforated top for sprinkling ground pepper	a shaker with a perforated top for sprinkling ground pepper