antiphonary vs antiphonal

antiphonary and antiphonal both are nouns.

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

As adjectives, antiphonary and antiphonal are synonyms defined as:

antiphonary and antiphonal: relating to or resembling an antiphon or antiphony

As nouns, antiphonary and antiphonal are synonyms defined as:

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

antiphonary (adjective)	antiphonal (adjective)
relating to or resembling an antiphon or antiphony	containing or using responses; alternating
	relating to or resembling an antiphon or antiphony