para aminobenzoic acid vs sunblock

para aminobenzoic acid and sunblock both are nouns.

Word	Noun	Adjective	Verb	Adverb
para aminobenzoic acid	Yes	No	No	No
sunblock	Yes	No	No	No

para aminobenzoic acid (noun)	sunblock (noun)
a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers	a cream spread on the skin; contains a chemical (as PABA) to filter out ultraviolet light and so protect from sunburn