add vs reckon

add and reckon both are verbs.

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

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

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

add (verb)	reckon (verb)
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of	deem to be
make an addition by combining numbers	make a mathematical calculation or computation
determine the sum of	expect, believe, or suppose
state or say further	judge to be probable
bestow a quality on	have faith or confidence in
constitute an addition	take account of