handshaking vs acknowledgement

handshaking and acknowledgement both are nouns.

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

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

handshaking: grasping and shaking a person's hand (as to acknowledge an introduction or to agree on a contract)
acknowledgement: a statement acknowledging something or someone

Other hypernyms of handshaking include acknowledgment.

handshaking (noun)	acknowledgement (noun)
grasping and shaking a person's hand (as to acknowledge an introduction or to agree on a contract)	a statement acknowledging something or someone
	the state or quality of being recognized or acknowledged