doublespeak vs equivocation

doublespeak and equivocation both are nouns.

Word	Noun	Adjective	Verb	Adverb
doublespeak	Yes	No	No	No
equivocation	Yes	No	No	No

As nouns, equivocation is a hypernym of doublespeak; that is, equivocation is a word with a broader meaning than doublespeak:

doublespeak: any language that pretends to communicate but actually does not
equivocation: a statement that is not literally false but that cleverly avoids an unpleasant truth

Other hypernyms of doublespeak include evasion.

doublespeak (noun)	equivocation (noun)
any language that pretends to communicate but actually does not	falsification by means of vague or ambiguous language
	intentionally vague or ambiguous
	a statement that is not literally false but that cleverly avoids an unpleasant truth