Open English Wordnet
Nouns
(n)motivation, motive, needthe psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior“we did not understand his motivation”, “he acted with the best of motives”
Verbs
(v)necessitate, ask, postulate, need, require, take, involve, call for, demandrequire as useful, just, or proper“It takes nerve to do what she did”, “success usually requires hard work”, “This job asks a lot of patience and skill”, “This position demands a lot of personal sacrifice”, “This dinner calls for a spectacular dessert”, “This intervention does not postulate a patient's consent”