assistant foreman vs straw boss

assistant foreman and straw boss both are nouns.

Word	Noun	Adjective	Verb	Adverb
assistant foreman	Yes	No	No	No
straw boss	Yes	No	No	No

As nouns, assistant foreman and straw boss are synonyms defined as:

assistant foreman and straw boss: a member of a work gang who supervises the other workers

assistant foreman (noun)	straw boss (noun)
a member of a work gang who supervises the other workers	a member of a work gang who supervises the other workers