(a.) Helpful.

advantageous aidful appropriate auspicious banausic benevolent benign bon bonny bracing braw bueno capital cogent commendable commodious conducive constitutional constructive contributory effective efficacious elegant employable estimable excellent expedient fair famous favorable fine fitting functional furthersome good good for goodly grand health-enhancing health-preserving healthful healthy helpful hygeian hygienic invigorating kind laudable nice noble of general utility of help of service of use pleasant positive practical pragmatical profitable proper refreshing regal remedial royal salubrious salutary sanitary serviceable skillful sound splendid supportive therapeutic tonic useful utilitarian valid very good virtuous wholesome