• involving or creating favourable circumstances that increase the chances of success or effectiveness; beneficial

Synonyms: superior, dominant, powerful, important, commanding, excellent, good, fine, fortunate, lucky, privileged, favourable, preferable, preferred, favoured, more desirable, most desirable, beneficial, of benefit, helpful, of assistance, useful, of use, valuable, of value, of service, profitable, fruitful, rewarding, gainful, lucrative