Typewriter and word processor (both are technologies for writing)
Teenager and adult (both are stages of life)
Knife and gun (both are weapons)
Caravan and tent (both are portable 'houses' where you can sleep)
Pond and lake (both are water reservoirs)
Hepatitis and sore throat (both are illnesses)
Street and motorway (both are spaces under open sky)
Dustman and dentist (both are people/professions)
Week and fortnight (both are time intervals)
Lemons and oranges (both are fruits)