.22-calibre vs .22 calibre

.22-calibre and .22 calibre both are adjectives.

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

As adjectives, .22-calibre and .22 calibre are synonyms defined as:

.22-calibre and .22 calibre: of or relating to the bore of a gun (or its ammunition) that measures twenty-two hundredths of an inch in diameter

Other synonyms of .22-calibre include .22-caliber, .22 caliber.

.22-calibre (adjective)	.22 calibre (adjective)
of or relating to the bore of a gun (or its ammunition) that measures twenty-two hundredths of an inch in diameter	of or relating to the bore of a gun (or its ammunition) that measures twenty-two hundredths of an inch in diameter