This word is acceptable for play in the UK dictionary that is being used in the following games:

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n. A book or liturgical responses

adj. Of or pertaining to a response (in all senses)

adj. Responsive

adj. Responsory; antiphonal.

Responsive; specifically, sung in response to or alternation with a lector or precentor.

n. An office-book formerly in use, containing the responsories or these and the antiphons for the canonical hours.

"Whatever the human author's conscious intent may have been, the Spirit is clearly speaking through this text of Jesus Christ and the motives of those who brought him to his earthly end—as does the "responsorial" psalm that follows."

responsory    antiphonal