catechism (en)

a summary of the principles of Christian religion in the form of questions and answers, used for the instruction of Christians

empyrean (en)

(adjective) empyreal / (noun) the highest heaven or heavenly sphere in ancient and medieval cosmology usually consisting of fire or light / (noun) the true and ultimate heavenly paradise / (noun) firmament heavens / (noun) an ideal place or state

lacuna (en)

an unfilled space; a gap (plural: lacunae)

oneiric (en)

(adjective) of or relating to dreams; dreamy

parlous (en)

(adjective) full of danger or uncertainty; precarious