>mining, mineral, minerals, exploration, geophysicist, geophysical, geophysicists, recruit, recruitment, recruiting, position, vacancy, career opportunity, job, jobs, employment, positions
>First of all, can anyone tell me whether the order in which these
>keywords are listed makes any difference.
>Secondly, does having the plural form of a word help or hinder.
It helps, since most users will search for the plural of any word
rather than the singular. You'll stand a better chance of a "perfect
match" if you use plurals throughout.