Uncommon

angst

[angkst]

a feeling of deep anxiety or dread

mellifluous

[muh-lif-loo-uhs]

sweetly or smoothly flowing; sweet-sounding

precipice

[pres-uh-pis]

a cliff with a vertical, nearly vertical, or overhanging face

allegiance

[all-eg-iank-e]

loyalty or commitment to a person, group, or cause.