demi-bastion vs half-bastion

demi-bastion and half-bastion both are nouns.

Word	Noun	Adjective	Verb	Adverb
demi-bastion	Yes	No	No	No
half-bastion	Yes	No	No	No

As nouns, demi-bastion and half-bastion are synonyms defined as:

demi-bastion and half-bastion: in military architecture, a bastion constructed of one face, and one flank.

demi-bastion (noun)	half-bastion (noun)
in military architecture, a bastion constructed of one face, and one flank.	in military architecture, a bastion constructed of one face, and one flank.