straw boss vs gaffer

straw boss and gaffer both are nouns.

Word	Noun	Adjective	Verb	Adverb
straw boss	Yes	No	No	No
gaffer	Yes	No	No	No

As nouns, gaffer is a hypernym of straw boss; that is, gaffer is a word with a broader meaning than straw boss:

Other hypernyms of straw boss include boss, chief, foreman, honcho.

straw boss (noun)	gaffer (noun)
a member of a work gang who supervises the other workers	a person who exercises control over workers
	an elderly man
	an electrician responsible for lighting on a movie or tv set