helpful

helpful
    adj 1: providing assistance or serving a useful function [ant:
           {unhelpful}]
    

Helpful \Help"ful\, a.
   Furnishing help; giving aid; assistant; useful; salutary.
   [1913 Webster]

         Heavens make our presence and our practices
         Pleasant and helpful to him!             --Shak.
   -- {Help"ful*ly}, adv. -- {Help"ful*ness}, n. --Milton.
   [1913 Webster]
    

112 Moby Thesaurus words for "helpful":
      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,
      commodious, complaisant, conducive, considerate, constructive,
      contributory, cooperative, delicate, effective, elegant,
      employable, estimable, excellent, expedient, facilitating, fair,
      famous, favorable, favoring, fine, fitting, forwarding, friendly,
      functional, furthersome, good, good for, goodly, grand, handy,
      healthy, heedful, indulgent, instrumental, intermediary, kind,
      laudable, lenient, mediating, mediatorial, mindful,
      mindful of others, ministerial, ministering, nice, noble, obliging,
      of general utility, of help, of service, of use, pleasant,
      positive, practical, pragmatic, pragmatical, productive,
      profitable, promoting, proper, propitious, reassuring, regal,
      regardful, remedial, royal, salutary, serviceable, skillful,
      solicitous, sound, splendid, subservient, supportive, sympathetic,
      tactful, therapeutic, thoughtful, tolerant, toward, usable, useful,
      utilitarian, valid, valuable, very good, virtuous