haircare vs hairdressing

haircare and hairdressing both are nouns.

Word	Noun	Adjective	Verb	Adverb
haircare	Yes	No	No	No
hairdressing	Yes	No	No	No

As nouns, haircare and hairdressing are synonyms defined as:

haircare and hairdressing: care for the hair: the activity of washing or cutting or curling or arranging the hair

Other synonyms of haircare include hair care.

haircare (noun)	hairdressing (noun)
care for the hair: the activity of washing or cutting or curling or arranging the hair	care for the hair: the activity of washing or cutting or curling or arranging the hair
	a toiletry for the hair