picture taking vs sensitise

picture taking is a noun but sensitise is not a noun.

Word	Noun	Adjective	Verb	Adverb
picture taking	Yes	No	No	No
sensitise	No	No	Yes	No

picture taking (noun)	sensitise (noun)
the act of taking and printing photographs

picture taking (verb)	sensitise (verb)
	make sensitive or aware
	make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion
	make sensitive to a drug or allergen
	cause to sense; make sensitive