As a non-native speaker of English, I struggle with the orthography of the word stop word. The term is used in the context of text mining, natural language processing and corpus linguistics. It refers to words which are usually ignored in subsequent text analyses due to their high frequency and/or their low informativity (e.g. most function words, auxiliary verbs etc.).
Which of the two spelling variants should I use? If you have a personal preference for either, I'd be happy to hear that. Please also add whether you're actually familiar with the term (e.g. because you work in the field of text analysis). This is particularly interesting because I'm going to use it in a software that is aimed at a technical audience.