At first glance the vocabulary of the language seems to change very rapidly, as new words spring up all the time. Could the following words be regarded as absolutely new? (Note the meaning, component parts and word-building pattern); jet-plane (cf. airplane), typescript (cf. manuscript), air-lift, baby-sitter, sputnik, Soviet, safari, bestseller, cyclization, air-taxi, astrobiology, sunsuit, pepper, gas.