guess vs dead reckoning

guess and dead reckoning both are nouns.

Word	Noun	Adjective	Verb	Adverb
guess	Yes	No	Yes	No
dead reckoning	Yes	No	No	No

As nouns, guess and dead reckoning are synonyms defined as:

Other synonyms of guess include guessing, guesswork, shot.

guess (noun)	dead reckoning (noun)
an estimate based on little or no information	navigation without the aid of celestial observations
a message expressing an opinion based on incomplete evidence	an estimate based on little or no information

guess (verb)	dead reckoning (verb)
expect, believe, or suppose
judge tentatively or form an estimate of (quantities or time)
guess correctly; solve by guessing
put forward, of a guess, in spite of possible refutation