archaeologism
the use of ponderous, old-fashioned language.
uncountable
Here is a liturgical revival which is within the potentialities of the humblest parish church or chapel and which is in no danger of degenerating into archaeologism, ritualism or aestheticism.
Where it comes from
From Ancient Greek ἀρχαῖος (arkhaîos) + λόγος (lógos, “word”).
Adapted from the Wiktionary entry archaeologism (CC BY-SA 4.0).