.45-calibre vs .45 calibre

.45-calibre and .45 calibre both are adjectives.

Word	Noun	Adjective	Verb	Adverb
.45-calibre	No	Yes	No	No
.45 calibre	No	Yes	No	No

As adjectives, .45-calibre and .45 calibre are synonyms defined as:

.45-calibre and .45 calibre: of or relating to the bore of a gun (or its ammunition) that measures forty-five hundredths of an inch in diameter

Other synonyms of .45-calibre include .45-caliber, .45 caliber.

.45-calibre (adjective)	.45 calibre (adjective)
of or relating to the bore of a gun (or its ammunition) that measures forty-five hundredths of an inch in diameter	of or relating to the bore of a gun (or its ammunition) that measures forty-five hundredths of an inch in diameter