Разговорное, устаревающее слово.
pietistFormal or slightly old-fashioned; may suggest conspicuous or excessive piety. Старый набожник ежедневно ходил в церковь.
The old pietist went to church every day.
worshipperReligious context; emphasizes a person engaged in worship. churchgoerUsed when the emphasis is on regular attendance at church rather than inner devotion. Synonyms
благочестивый человек
религиозный человек
верующий человек