hairlike vs capillary

hairlike is not a noun while capillary is a noun.

Word	Noun	Adjective	Verb	Adverb
hairlike	No	Yes	No	No
capillary	Yes	Yes	No	No

As adjectives, hairlike and capillary are synonyms defined as:

hairlike and capillary: long and slender with a very small internal diameter

hairlike (noun)	capillary (noun)
	a tube of small internal diameter; holds liquid by capillary action
	any of the minute blood vessels connecting arterioles with venules

hairlike (adjective)	capillary (adjective)
long and slender with a very small internal diameter	of or relating to hair
	long and slender with a very small internal diameter