attractive, effective, good, radical
acceptable, reasonable, suitable
available, credible, practical, real, realistic, serious, viable
Is there a viable alternative to prison?

clear, obvious
cheap, healthy, interesting, safe
a healthier alternative to fried chicken

have
We have two alternatives.

offer, provide
His idea seemed to offer a possible alternative.

develop, find, seek
We'll have to find an alternative.
They are seeking alternatives to fossil fuels.

consider, discuss, explore
present, propose, suggest

be available, exist

alternative for
There is no alternative for those with no car of their own.

alternative to
Is there an alternative to surgery for this complaint?

have little alternative (but to), have no alternative (but to)
She had no alternative but to do as he said.

leave sb with no alternative (but to)
He was left with no alternative but to hobble to the nearest hospital.

Alternative is used with these nouns:
approach, arrangement, comedian, comedy, conception, definition, ending, energy, explanation, fuel, hypothesis, idea, interpretation, lifestyle, means, mechanism, medicine, method, model, music, perspective, point of view, premises, procedure, pronunciation, religion, remedy, rock, route, scenario, solution, source, spelling, strategy, suggestion, technique, technology, theory, therapy, treatment, type, universe, venue, view, viewpoint, vision, way, world