invitation vs asking

invitation and asking both are nouns.

Word	Noun	Adjective	Verb	Adverb
invitation	Yes	No	No	No
asking	Yes	No	No	No

As nouns, asking is a hypernym of invitation; that is, asking is a word with a broader meaning than invitation:

invitation: a request (spoken or written) to participate or be present or take part in something
asking: the verbal act of requesting

Other hypernyms of invitation include letter, missive, request.

invitation (noun)	asking (noun)
a tempting allurement	the verbal act of requesting
a request (spoken or written) to participate or be present or take part in something