declination vs acknowledgement

declination and acknowledgement both are nouns.

Word	Noun	Adjective	Verb	Adverb
declination	Yes	No	No	No
acknowledgement	Yes	No	No	No

As nouns, acknowledgement is a hypernym of declination; that is, acknowledgement is a word with a broader meaning than declination:

Other hypernyms of declination include acknowledgment, refusal.

declination (noun)	acknowledgement (noun)
a polite refusal of an invitation	a statement acknowledging something or someone
(astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere	the state or quality of being recognized or acknowledged
a downward slope or bend
a condition inferior to an earlier condition; a gradual falling off from a better state; decline