responsive vs antiphonal

responsive is not a noun while antiphonal is a noun.

Word	Noun	Adjective	Verb	Adverb
responsive	No	Yes	No	No
antiphonal	Yes	Yes	No	No

As adjectives, responsive and antiphonal are synonyms defined as:

responsive (noun)	antiphonal (noun)
	bound collection of antiphons

responsive (adjective)	antiphonal (adjective)
readily reacting or replying to people or events or stimuli; showing emotion	containing or using responses; alternating
containing or using responses; alternating	relating to or resembling an antiphon or antiphony
reacting to a stimulus