sun blocker vs sunblock

sun blocker and sunblock both are nouns.

Word	Noun	Adjective	Verb	Adverb
sun blocker	Yes	No	No	No
sunblock	Yes	No	No	No

As nouns, sun blocker and sunblock are synonyms defined as:

sun blocker and sunblock: a cream spread on the skin; contains a chemical (as PABA) to filter out ultraviolet light and so protect from sunburn

Other synonyms of sun blocker include sunscreen.

sun blocker (noun)	sunblock (noun)
a cream spread on the skin; contains a chemical (as PABA) to filter out ultraviolet light and so protect from sunburn	a cream spread on the skin; contains a chemical (as PABA) to filter out ultraviolet light and so protect from sunburn