sanitary napkin vs sanitary towel

sanitary napkin and sanitary towel both are nouns.

Word	Noun	Adjective	Verb	Adverb
sanitary napkin	Yes	No	No	No
sanitary towel	Yes	No	No	No

As nouns, sanitary napkin and sanitary towel are synonyms defined as:

sanitary napkin and sanitary towel: a disposable absorbent pad (trade name Kotex); worn to absorb menstrual flow

Other synonyms of sanitary napkin include Kotex.

sanitary napkin (noun)	sanitary towel (noun)
a disposable absorbent pad (trade name Kotex); worn to absorb menstrual flow	a disposable absorbent pad (trade name Kotex); worn to absorb menstrual flow