half-truth vs deception

half-truth and deception both are nouns.

Word	Noun	Adjective	Verb	Adverb
half-truth	Yes	No	No	No
deception	Yes	No	No	No

As nouns, deception is a hypernym of half-truth; that is, deception is a word with a broader meaning than half-truth:

Other hypernyms of half-truth include deceit, misrepresentation.

half-truth (noun)	deception (noun)
a partially true statement intended to deceive or mislead	the act of deceiving
	an illusory feat; considered magical by naive observers
	a misleading falsehood