junk bond vs high-yield bond

junk bond and high-yield bond both are nouns.

Word	Noun	Adjective	Verb	Adverb
junk bond	Yes	No	No	No
high-yield bond	Yes	No	No	No

As nouns, junk bond and high-yield bond are synonyms defined as:

junk bond and high-yield bond: a (speculative) bond with a credit rating of BB or lower; issued for leveraged buyouts and other takeovers by companies with questionable credit

junk bond (noun)	high-yield bond (noun)
a (speculative) bond with a credit rating of BB or lower; issued for leveraged buyouts and other takeovers by companies with questionable credit	a (speculative) bond with a credit rating of BB or lower; issued for leveraged buyouts and other takeovers by companies with questionable credit