add vs add up

add and add up both are verbs.

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

As verbs, add and add up are synonyms defined as:

Other synonyms of add include add together, sum, sum up, summate, tally, tot, tot up, total, tote up.

add (verb)	add up (verb)
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of	determine the sum of
make an addition by combining numbers	be reasonable or logical or comprehensible
determine the sum of	to measure up to in kind or quality
state or say further	add up in number or quantity
bestow a quality on
constitute an addition