As verbs the difference between legitimises and legitimizes
is that legitimises is third-person singular of legitimise while legitimizes is third-person singular of legitimize.
legitimizes
English
Verb
(head)
(legitimize)
legitimize
English
Alternative forms
* legitimise
Verb
(legitimiz)
To make legitimate.
Usage notes
* Forms of (legitimize) ares about twice as common as forms of the verb legitimate in the US.
* Forms of legitimate are somewhat more common than the forms of the verbs (legitimize) and (legitimise) in the UK combined.
Synonyms
* legitimate (verb)
Derived terms
* delegitimize
* illegitimatize
* illegitimize