Sirach vs Ben Sira

Sirach and Ben Sira both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sirach	Yes	No	No	No
Ben Sira	Yes	No	No	No

As nouns, Sirach and Ben Sira are synonyms defined as:

Sirach and Ben Sira: an Apocryphal book mainly of maxims (resembling Proverbs in that respect)

Other synonyms of Sirach include Ecclesiasticus, Wisdom of Jesus the Son of Sirach.

Sirach (noun)	Ben Sira (noun)
an Apocryphal book mainly of maxims (resembling Proverbs in that respect)	an Apocryphal book mainly of maxims (resembling Proverbs in that respect)