confirmation vs sacrament

confirmation and sacrament both are nouns.

Word	Noun	Adjective	Verb	Adverb
confirmation	Yes	No	No	No
sacrament	Yes	No	No	No

As nouns, sacrament is a hypernym of confirmation; that is, sacrament is a word with a broader meaning than confirmation:

confirmation: a sacrament admitting a baptized person to full participation in the church
sacrament: a formal religious ceremony conferring a specific grace on those who receive it; the two Protestant ceremonies are baptism and the Lord's Supper; in the Roman Catholic Church and the Eastern Orthodox Church there are seven traditional rites accepted as instituted by Jesus: baptism and confirmation and Holy Eucharist and penance and holy orders and matrimony and extreme unction

confirmation (noun)	sacrament (noun)
a sacrament admitting a baptized person to full participation in the church	a formal religious ceremony conferring a specific grace on those who receive it; the two Protestant ceremonies are baptism and the Lord's Supper; in the Roman Catholic Church and the Eastern Orthodox Church there are seven traditional rites accepted as instituted by Jesus: baptism and confirmation and Holy Eucharist and penance and holy orders and matrimony and extreme unction
a ceremony held in the synagogue (usually at Pentecost) to admit as adult members of the Jewish community young men and women who have successfully completed a course of study in Judaism
additional proof that something that was believed (some fact or hypothesis or theory) is correct
information that confirms or verifies
making something valid by formally ratifying or confirming it