bolo knife vs bolo

bolo knife and bolo both are nouns.

Word	Noun	Adjective	Verb	Adverb
bolo knife	Yes	No	No	No
bolo	Yes	No	No	No

As nouns, bolo knife and bolo are synonyms defined as:

bolo knife and bolo: long heavy knife with a single edge; of Philippine origin

bolo knife (noun)	bolo (noun)
long heavy knife with a single edge; of Philippine origin	long heavy knife with a single edge; of Philippine origin
	a cord fastened around the neck with an ornamental clasp and worn as a necktie