stage fright: fear that affects a person about to face an audience
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
single nucleotide polymorphism: (genetics) genetic variation in a DNA sequence that occurs when a single nucleotide in a genome is altered; SNPs are usually considered to be point mutations that have been evolutionarily successful enough to recur in a significant proportion of the population of a species