truth vs fidelity

truth and fidelity both are nouns.

Word	Noun	Adjective	Verb	Adverb
truth	Yes	No	No	No
fidelity	Yes	No	No	No

As nouns, fidelity is a hyponym of truth; that is, fidelity is a word with a more specific, narrower meaning than truth:

truth: the quality of being near to the true value
fidelity: accuracy with which an electronic system reproduces the sound or image of its input signal

Other hyponyms of truth include exactitude, exactness.

truth (noun)	fidelity (noun)
the quality of being near to the true value	the quality of being faithful
a fact that has been verified	accuracy with which an electronic system reproduces the sound or image of its input signal
a true statement
conformity to reality or actuality