Seanad vs Seanad Eireann

Seanad and Seanad Eireann both are nouns.

Word	Noun	Adjective	Verb	Adverb
Seanad	Yes	No	No	No
Seanad Eireann	Yes	No	No	No

As nouns, Seanad and Seanad Eireann are synonyms defined as:

Seanad and Seanad Eireann: the upper house of the parliament of the Irish Republic

Seanad (noun)	Seanad Eireann (noun)
the upper house of the parliament of the Irish Republic	the upper house of the parliament of the Irish Republic