desensitizing vs desensitising

desensitizing and desensitising both are adjectives.

Word	Noun	Adjective	Verb	Adverb
desensitizing	No	Yes	No	No
desensitising	No	Yes	No	No

As adjectives, desensitizing and desensitising are synonyms defined as:

desensitizing and desensitising: making less susceptible or sensitive to either physical or emotional stimuli

desensitizing (adjective)	desensitising (adjective)
making less susceptible or sensitive to either physical or emotional stimuli	making less susceptible or sensitive to either physical or emotional stimuli