sacramentalist

sac·ra·men·tal·ism

S0010500 (săk′rə-mĕn′tl-ĭz′əm)n.1. The doctrine that observance of the sacraments is necessary for salvation and that such participation can confer grace.2. Emphasis on the efficacy of a sacramental.
sac′ra·men′tal·ist n.