helpful

Synonyms: accessible accommodating advantageous applicable benevolent bettering caring conducive considerate constructive contributive convenient cooperative crucial effectual efficacious essential favorable fortunate friendly good for important improving instrumental invaluable kind neighborly operative practical pragmatic productive profitable serendipitous serviceable significant suitable supportive symbiotic sympathetic timely usable useful utilitarian valuable

Antonyms: disadvantageous harmful hurtful injurious unconstructive unhelpful useless worthless