throwster vs worker

throwster and worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
throwster	Yes	No	No	No
worker	Yes	No	No	No

As nouns, worker is a hypernym of throwster; that is, worker is a word with a broader meaning than throwster:

throwster: a person who twists silk or rayon filaments into a thread or yarn
worker: a person who works at a specific occupation

throwster (noun)	worker (noun)
a person who twists silk or rayon filaments into a thread or yarn	sterile member of a colony of social insects that forages for food and cares for the larvae
	a person who works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done