abnormal, unnatural / forced, strained / artificial

unnaturalness / strain / artificiality

appetizer, starter, hors d'oeuvre (small, light first course)

abiogenesis, the theory of spontaneous generation

asymptote

previously created work, someone's earlier work / crops cultivated earlier (than similar ones planted later)

a total loss, a write-off

front garden, front yard / vestibule of the ear

total length, span

the entire area, the area throughout