Perhaps you should try some spelling variations:
synthesizer » synthesized, synthesizes, synthesizing, synthesizedr, synthesisr, syntheser
synthesizeddr » synthesized, synthesizedand, synthesizes, synthesizedddr, synthesisddr, syntheseddr
synthesiser » synthesisers, synthesises, synthesised
synthesize » synthesized, synthesis, synthese

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( synthesizer OR ( synthesizeddr OR synthesiser )) OR synthesize ).
• Adding a wildcard symbol may retrieve word variants: (( synthesizer or ( synthesizeddr or synthesiser )) or synthesize )*.