sunblock

As a noun sunblock

is a cream, to be spread on the skin, containing organic compounds that absorb, and/or titanium dioxide that reflects the sun’s ultraviolet radiation.

As a verb unblock is

to remove or clear a block or obstruction from.

As nouns the difference between sunblock and subblock

is that sunblock is a cream, to be spread on the skin, containing organic compounds that absorb, and/or titanium dioxide that reflects the sun’s ultraviolet radiation while subblock is a block (of data, etc.) making up part of a larger block.

As a noun sunblock

is a cream, to be spread on the skin, containing organic compounds that absorb, and/or titanium dioxide that reflects the sun’s ultraviolet radiation.

As an adjective sunblocked is

wearing sunblock.