hitchrack vs hitching bar

hitchrack and hitching bar both are nouns.

Word	Noun	Adjective	Verb	Adverb
hitchrack	Yes	No	No	No
hitching bar	Yes	No	No	No

As nouns, hitchrack and hitching bar are synonyms defined as:

hitchrack and hitching bar: a fixed horizontal rail to which a horse can be hitched to prevent it from straying

hitchrack (noun)	hitching bar (noun)
a fixed horizontal rail to which a horse can be hitched to prevent it from straying	a fixed horizontal rail to which a horse can be hitched to prevent it from straying