bore vs calibre

bore and calibre both are nouns.

Word	Noun	Adjective	Verb	Adverb
bore	Yes	No	Yes	No
calibre	Yes	No	No	No

As nouns, bore and calibre are synonyms defined as:

Other synonyms of bore include caliber, gauge.

bore (noun)	calibre (noun)
a hole or passage made by a drill; usually made for exploratory purposes	a degree or grade of excellence or worth
diameter of a tube or gun barrel	diameter of a tube or gun barrel
a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)
a person who evokes boredom

bore (verb)	calibre (verb)
make a hole, especially with a pointed power or hand tool
cause to be bored