1
general::
or
conjunction used between two possibilities or choices, or before the last one in a list of possibilities or choices:
• Don’t get the chemicals on your hands or your clothes. • Payment can be made by cash, cheque or credit card.
alternatively
adverb used when giving another choice apart from the one you have already mentioned:
• Use a pair of scissors or, alternatively, a very sharp knife. • You can go up into the mountains. Alternatively, you can stroll around one of Switzerland’s delightful cities.
on the one had ... on the other (hand)
used when giving two very different ideas or opinions about something, especially when they need to be balanced against each other:
• On the one hand, I don’t want to hurt his feelings, but on the other, I don’t want to be miserable for the rest of my life.
Longman-Thesaurus