balk vs American spelling

balk and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
balk	Yes	No	Yes	No
American spelling	Yes	No	No	No

balk (noun)	American spelling (noun)
an illegal pitching motion while runners are on base	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
one of several parallel sloping beams that support a roof
something immaterial that interferes with or delays action or progress
the area on a billiard table behind the balkline

balk (verb)	American spelling (verb)
refuse to comply