add vs calculate

add and calculate both are verbs.

Word	Noun	Adjective	Verb	Adverb
add	No	No	Yes	No
calculate	No	No	Yes	No

As verbs, calculate is a hypernym of add; that is, calculate is a word with a broader meaning than add:

Other hypernyms of add include cipher, compute, cypher, figure, reckon, work out.

add (verb)	calculate (verb)
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of	make a mathematical calculation or computation
make an addition by combining numbers	specifically design a product, event, or activity for a certain public
determine the sum of	judge to be probable
state or say further	have faith or confidence in
bestow a quality on	predict in advance
constitute an addition	keep an account of