balsam vs tolu

balsam and tolu both are nouns.

Word	Noun	Adjective	Verb	Adverb
balsam	Yes	No	No	No
tolu	Yes	No	No	No

As nouns, tolu is a hyponym of balsam; that is, tolu is a word with a more specific, narrower meaning than balsam:

balsam: any of various fragrant oleoresins used in medicines and perfumes
tolu: aromatic yellowish brown balsam from the tolu balsam tree used especially in cough syrups

Other hyponyms of balsam include balsam of tolu, tolu balsam, balm.

balsam (noun)	tolu (noun)
an ointment containing a fragrant resin	aromatic yellowish brown balsam from the tolu balsam tree used especially in cough syrups
any seed plant yielding balsam
any of various fragrant oleoresins used in medicines and perfumes