hanger vs dress hanger

hanger and dress hanger both are nouns.

Word	Noun	Adjective	Verb	Adverb
hanger	Yes	No	No	No
dress hanger	Yes	No	No	No

As nouns, dress hanger is a hyponym of hanger; that is, dress hanger is a word with a more specific, narrower meaning than hanger:

hanger: anything from which something can be hung
dress hanger: a hanger that is shaped like a person's shoulders and used to hang garments on

Other hyponyms of hanger include clothes hanger, coat hanger, strap.

hanger (noun)	dress hanger (noun)
anything from which something can be hung	a hanger that is shaped like a person's shoulders and used to hang garments on
a worker who hangs something