[adj] showing a willingness to cooperate; "a helpful cooperative patient"; "parents hope to raise children who are considerate and helpful to others"
[adj] providing assistance or serving a useful function
[adj] of service or assistance; "a child who is helpful around the house can save the mother many steps"
accommodating, adjuvant, assistive, attending, cooperative, face-saving, facilitative, facilitatory, implemental, instrumental, kind, laborsaving, laboursaving, ministering, ministrant, reformative, reformatory, right-hand, stabilising, stabilizing, stead
accommodating, accommodative, advantageous, agential, agentival, agentive, agreeable, aidful, aiding, appropriate, assisting, attentive, auspicious, banausic, beneficial, benevolent, bon, bonny, brave, braw, bueno, capital, caring, cogent, commendable, co