1) Blackleg 2) Picket line crosser 3) Scab 4) Short story by Isaac Asimov 5) Worker 1) Fink 
A strikebreaker (sometimes derogatorily called a scab, blackleg, or knobstick) is a person who works despite an ongoing strike. Strikebreakers are usually individuals who are not employed by the company prior to the trade union dispute, but rather hired after or during the strike to keep the organization running. `Strikebreakers` may also refer .....[short story] `Strikebreaker` is a science fiction short story by Isaac Asimov. It was first published in the January 1957 issue of The Original Science Fiction Stories under the title `Male Strikebreaker` and reprinted in the 1969 collection Nightfall and Other Stories under the original title `Strikebreaker`. Asimov has stated that the ed...
a person who takes part in breaking up a strike of workers, either by working or by furnishing workers.