Lord's Supper vs sacrament

Lord's Supper and sacrament both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lord's Supper	Yes	No	No	No
sacrament	Yes	No	No	No

As nouns, sacrament is a hypernym of Lord's Supper; that is, sacrament is a word with a broader meaning than Lord's Supper:

Lord's Supper: a Christian sacrament commemorating the Last Supper by consecrating bread and wine
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

Lord's Supper (noun)	sacrament (noun)
a Christian sacrament commemorating the Last Supper by consecrating bread and wine	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
the traditional Passover supper of Jesus with his disciples on the eve of his crucifixion