liaison vs involvement

liaison and involvement both are nouns.

Word	Noun	Adjective	Verb	Adverb
liaison	Yes	No	No	No
involvement	Yes	No	No	No

As nouns, liaison and involvement are synonyms defined as:

liaison and involvement: a usually secretive or illicit sexual relationship

Other synonyms of liaison include affair, affaire, amour, intimacy.

liaison (noun)	involvement (noun)
a channel for communication between groups	the act of sharing in the activities of a group
a usually secretive or illicit sexual relationship	a sense of concern with and curiosity about someone or something
	a connection of inclusion or containment
	a usually secretive or illicit sexual relationship
	the condition of sharing in common with others (as fellows or partners etc.)