pension off vs give the sack

pension off and give the sack both are verbs.

Word	Noun	Adjective	Verb	Adverb
pension off	No	No	Yes	No
give the sack	No	No	Yes	No

As verbs, give the sack is a hypernym of pension off; that is, give the sack is a word with a broader meaning than pension off:

pension off: let go from employment with an attractive pension
give the sack: terminate the employment of; discharge from an office or position

Other hypernyms of pension off include can, dismiss, displace, fire, force out, give notice, give the axe, sack, send away, terminate.

pension off (verb)	give the sack (verb)
grant a pension to	terminate the employment of; discharge from an office or position
let go from employment with an attractive pension