trusty vs yardbird

trusty and yardbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
trusty	Yes	Yes	No	No
yardbird	Yes	No	No	No

As nouns, yardbird is a hypernym of trusty; that is, yardbird is a word with a broader meaning than trusty:

trusty: a convict who is considered trustworthy and granted special privileges
yardbird: a person serving a sentence in a jail or prison

Other hypernyms of trusty include con, convict, inmate, yard bird.

trusty (noun)	yardbird (noun)
a convict who is considered trustworthy and granted special privileges	a military recruit who is assigned menial tasks
	a person serving a sentence in a jail or prison

trusty (adjective)	yardbird (adjective)
worthy of trust or belief