Single word, phrasing and re-phrasing requests are off-topic in Writers.SE. They have a place where they are on-topic, frequent and welcome and that place is English.SE.
From the English Language and Usage faq:
Questions on the following topics are welcomed here:
Single word requests, like the one in the question, are frequently addressed in English.SE. In fact there have been nearly 2800 questions asked on the topic of [single-word-requests] in EL&U and a mere handful (about 60) on Writers about [word-choice].
By itself this clearly puts most word choice questions in the realm of English.SE and not Writers.SE.
This isn't to say that word choice questions can or should be always off-topic all the time at Writers.SE. But there needs to be ground rules.
Looking at the 60 or so questions on word choice, the ones with the most amount of views, up-votes and constructive answers are about the process of choosing the right word (i.e. how to use the right amount of swear words or avoiding "had had", etc.). The ones with the fewest views and least helpful answers are generally about finding one specific word.
Since that's the case, questions about how to choose the right word are on-topic. Questions about choosing a specific word are off-topic and should be closed or migrated to English.SE as warranted. In other words, word choice on English.SE should be for people looking for a fish and word choice on Writers.SE should be for people learning how to fish.