balm vs unguent

balm and unguent both are nouns.

Word	Noun	Adjective	Verb	Adverb
balm	Yes	No	No	No
unguent	Yes	No	No	No

As nouns, balm and unguent are synonyms defined as:

balm and unguent: semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation

Other synonyms of balm include ointment, salve, unction.

balm (noun)	unguent (noun)
semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation	semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation
any of various aromatic resinous substances used for healing and soothing