encomium
Concise Oxford English Dictionary © 2008 Oxford University Press:
encomium /ɛnˈkəʊmɪəm/
▶noun (pl. encomiums or encomia) formal a speech or piece of writing expressing praise.
– origin C16: L., from Gk enkōmion ‘eulogy’.
'encomium' also found in these Oxford entries:

