WordNet sense 1 (rip off; ask an unreasonable price):

fleece, hook, overcharge, pluck, rob, soak, surcharge, gazump

WordNet sense 2 (the light horny waterproof structure forming the external covering of birds):

feather, plumage

WordNet sense 3 (be proud of):

congratulate, pride

WordNet sense 4 (clean with one's bill):

preen

WordNet sense 5 (dress or groom with elaborate care):

dress, primp