Here are the different combinations to make an idea in Alchemy 2.

2x alchemist
2x angler
2x astronaut

2x baker
2x butcher
2x cyclist
2x diver
2x doctor
2x electrician
2x engineer
2x farmer
2x firefighter
2x gardener
2x hacker
2x knight
2x librarian
2x lumberjack
2x mailman
2x monarch
2x philosophy
2x pilot
2x sailor
2x science
2x skier
2x surfer
2x swimmer
2x warrior
engineer + light bulb
human + light bulb
light bulb + science
philosophy + science