asphyxiate vs give-up the ghost

asphyxiate and give-up the ghost both are verbs.

Word	Noun	Adjective	Verb	Adverb
asphyxiate	No	No	Yes	No
give-up the ghost	No	No	Yes	No

As verbs, give-up the ghost is a hypernym of asphyxiate; that is, give-up the ghost is a word with a broader meaning than asphyxiate:

asphyxiate: be asphyxiated; die from lack of oxygen
give-up the ghost: pass from physical life and lose all bodily attributes and functions necessary to sustain life

asphyxiate (verb)	give-up the ghost (verb)
be asphyxiated; die from lack of oxygen	pass from physical life and lose all bodily attributes and functions necessary to sustain life
deprive of oxygen and prevent from breathing
impair the respiration of or obstruct the air passage of