swear vs reckon

swear and reckon both are verbs.

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

As verbs, swear and reckon are synonyms defined as:

Other synonyms of swear include bank, bet, calculate, count, depend, look, rely.

swear (verb)	reckon (verb)
have faith or confidence in	deem to be
make a deposition; declare under oath	make a mathematical calculation or computation
utter obscenities or profanities	expect, believe, or suppose
promise solemnly; take an oath	judge to be probable
to declare or affirm solemnly and formally as true	have faith or confidence in
	take account of