1. averageness, mediocrity, ordinariness, mundaneness, mundanity

usage: ordinariness as a consequence of being average and not outstanding

2. second-rater, mediocrity, person, individual, someone, somebody, mortal, soul

usage: a person of second-rate ability or value; "a team of aging second-raters"; "shone among the mediocrities who surrounded him"

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See also: mediocrity (Dictionary)