alien

n

1. foreigner, outsider, stranger, unnaturalized citizen; outlander, tramontane, barbarian; newcomer, immigrant, emigrant, Often Disparaging. wetback.

adj

2. foreign, unnaturalized; tramontane, transmontane, ultramontane, transalpine, barbarian; ultramarine, transmarine, transatlantic, transpacific; exotic, strange, outlandish; distant, remote, faraway; nonterrestrial, unearthly, ultramundane.

3. adverse, hostile, opposed, inimical, antagonistic; conflicting, contrasting, contradictory, counteracting, contrary, opposite; unlike, dissimilar, differing; extrinsic, adventitious, outward, external.