Keyword Analysis & Research: is it optimise or optimize

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
is it optimise or optimize	1.31	0.8	9701	42	26
is	0.26	0.6	8439	57	2
it	0.4	0.2	4066	32	2
optimise	0.8	0.3	330	99	8
or	1.61	0.5	5577	72	2
optimize	0.63	0.4	9333	41	8

Keyword	CPC	PCC	Volume	Score
is it optimise or optimize	0.18	0.5	6132	35
optimise or optimize	1.56	0.3	2795	65
optimise vs optimize	1.7	0.2	6732	93
optimise or optimize uk	1.63	0.5	7479	45
optimise or optimize australia	0.85	0.4	1662	81
optimise or optimize uk spelling	1.41	0.6	720	10
difference between optimise and optimize	0.37	0.7	4336	17
optimise and optimize	0.69	0.6	7014	87