聖歌 is read as せいか (seika) and means hymn.
せいか
seika
せいかたい
choir
ぐれごりおせいか
Gregorian chant
かせい
great poet
せいしょ
Bible
せいじん
refined sake
せいじゃ
saint
せいぼ
mother of a holy person
せいち
real-life location used as a setting in a novel, film, anime, etc.
せいせん
holy war
せいいき
issue that is regarded as being off-limits
Olympic flame
せいしょくしゃ
clergyman