Words that have gone into obscurity 

Allemande: courtly baroque dance in which the arms are interlaced

Logophile: a lover of words

Delenda: things to be deleted or destroyed

Orphrey: Gold or other rich embroidery

Phrontistery: a thinking-place; a place of study

Celeste: sky blue

Aureate: the fanciful and flowery language of poets

Rosarium: a rose garden; or someone who grows roses

Eudaemonia: true happiness

Eremite: a hermit; one who lives in solitude

Eidolon: a phantom, or spectre; a shadow of mere existence

(Source: rose-coloured-dreams, via honeyed)