balsam vs tolu balsam

balsam and tolu balsam both are nouns.

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

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

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

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

balsam (noun)	tolu balsam (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