drill hole vs bore-hole

drill hole and bore-hole both are nouns.

Word	Noun	Adjective	Verb	Adverb
drill hole	Yes	No	No	No
bore-hole	Yes	No	No	No

As nouns, drill hole and bore-hole are synonyms defined as:

drill hole and bore-hole: a hole or passage made by a drill; usually made for exploratory purposes

Other synonyms of drill hole include bore.

drill hole (noun)	bore-hole (noun)
a hole or passage made by a drill; usually made for exploratory purposes	a hole or passage made by a drill; usually made for exploratory purposes