Alternatively

You can walk, or alternatively, I'll drive you there in my car.

Source: tatoeba (320497)

Tom for Mary and Mary for Tom were alternatively the subject and the object.

Source: tatoeba (1247352)

Alternatively, they say, OPEC could defer a decision altogether and review policy again at a special meeting in January.

Source: tatoeba (11301805)

The nature of memory has been the subject of considerable speculation in the past. It has long been felt intuitively that retention of information in the central nervous system involves either an alteration of preexisting material or structure, or, alternatively, synthesis of materials not present previously. The cellular site of operational alteration was unknown but, again intuitively, was felt to be closely associated with the synapses. The problems faced by early investigators were great; but nevertheless much information relevant to the question of biological information storage was obtained. With the relatively recent advent of more refined tools and methodologies, there has been rapid progress.

Source: tatoeba (12204644)