knight bachelor vs bachelor

knight bachelor and bachelor both are nouns.

Word	Noun	Adjective	Verb	Adverb
knight bachelor	Yes	No	No	No
bachelor	Yes	No	Yes	No

As nouns, knight bachelor and bachelor are synonyms defined as:

knight bachelor and bachelor: a knight of the lowest order; could display only a pennon

Other synonyms of knight bachelor include bachelor-at-arms.

knight bachelor (noun)	bachelor (noun)
a knight of the lowest order; could display only a pennon	a man who has never been married
	a knight of the lowest order; could display only a pennon

knight bachelor (verb)	bachelor (verb)
	lead a bachelor's existence