71.ability=capacity, capability(the same as ability)
72.strange=eccentric(if some one is eccentric, s/he behaves in a strange way, or his/her opinion is different from most people)
73.rich=affluent(if you are affluent, you have a lot of money)
74.use= utilize (the same as use)
75.dubious=skeptical(if you are skeptical about something, you have doubts on it.)