ours, whereabouts, books, pens

keys, foots, gets

brontosaurus, ceratosaurus, dinosaur, elasmosaurus, hadrosaur, ichthyosaur, mosasaurus, plesiosaurus, Proterosaurus, saurian, stegosaurus, tyrannosaurus

-scope
hygroscope, kaleidoscope, microscope, ophthalmoscope, oscilloscope, periscope, spectroscope, stereoscope, stethoscope, stroboscope
-scopy
fluoroscopy
, cystoscopy

apostleship, apprenticeship, authorship, bipartisanship, censorship, championship, citizenship, clerkship, companionship, conservatorship, courtship, craftsmanship, dealership, dictatorship, directorship, discipleship, editorship

adventuresome, awesome, blithesome, bothersome, burdensome, cumbersome, darksome, delightsome

foursome, threesome

autosome, centrosome, chromosome, lysosome

chirosophy

mean-spirited, free-spirited

free-spoken, outspoken, plain-spoken, soft-spoken, well-spoken

Baluchistan, Hindustan, Kazakhstan, Pakistan

gyrostat, hydrostatic, photostat, rheostat

roadster, punster, barrister, brewster, chorister, dragster, fraudster, gangster, hipster, jokester, lecher, lobster, maltster, mobster, oldster, pollster