Holy Sacrament vs sacrament

Holy Sacrament and sacrament both are nouns.

Word	Noun	Adjective	Verb	Adverb
Holy Sacrament	Yes	No	No	No
sacrament	Yes	No	No	No

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

Holy Sacrament: 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

Holy Sacrament (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