recipient vs participant role

recipient and participant role both are nouns.

Word	Noun	Adjective	Verb	Adverb
recipient	Yes	No	No	No
participant role	Yes	No	No	No

As nouns, participant role is a hypernym of recipient; that is, participant role is a word with a broader meaning than recipient:

recipient: the semantic role of the animate entity that is passively involved in the happening denoted by the verb in the clause
participant role: (linguistics) the underlying relation that a constituent has with the main verb in a clause

Other hypernyms of recipient include semantic role.

recipient (noun)	participant role (noun)
the semantic role of the animate entity that is passively involved in the happening denoted by the verb in the clause	(linguistics) the underlying relation that a constituent has with the main verb in a clause
a person who receives something