gallows-tree vs gallous

gallows-tree and gallous both are nouns.

Word	Noun	Adjective	Verb	Adverb
gallows-tree	Yes	No	No	No
gallous	Yes	No	No	No

As nouns, gallows-tree and gallous are synonyms defined as:

Other synonyms of gallows-tree include gallows tree, gibbet.

gallows-tree (noun)	gallous (noun)
alternative terms for gallows	alternative terms for gallows