pocket calculator vs hand calculator

pocket calculator and hand calculator both are nouns.

Word	Noun	Adjective	Verb	Adverb
pocket calculator	Yes	No	No	No
hand calculator	Yes	No	No	No

As nouns, pocket calculator and hand calculator are synonyms defined as:

pocket calculator and hand calculator: a calculator small enough to hold in the hand or carry in a pocket

pocket calculator (noun)	hand calculator (noun)
a calculator small enough to hold in the hand or carry in a pocket	a calculator small enough to hold in the hand or carry in a pocket