hair grease vs hair tonic

hair grease and hair tonic both are nouns.

Word	Noun	Adjective	Verb	Adverb
hair grease	Yes	No	No	No
hair tonic	Yes	No	No	No

As nouns, hair grease and hair tonic are synonyms defined as:

Other synonyms of hair grease include hair oil, hairdressing.

hair grease (noun)	hair tonic (noun)
a toiletry for the hair	a toiletry for the hair