I offer the following evidence:

For those not familiar with the idea of a Googlewhack, Urban Dictionary explains it is:

a combination of two words that when searched through the popular search engine "google" only give one result.

Wikipedia goes into more depth, yet is silent on the topic of spelling.

I argue that stsadmin, or it's correct form, stsadm are not words, so can't be typos - and as such I'm claiming it!