Each word comes with a label: noun (n), verb (v), adjective (adj), adverb (adv), preposition (prep), conjunction (conj), or pronoun (pron). This is critical. The word "run" can be a verb ( I run fast ) or a noun ( a run in my stocking ). The Oxford list clarifies this.

The authentic (which includes the top ~1000 most critical) is available as a free PDF on Oxford’s learner’s dictionary site. Search: 👉 "Oxford 3000 PDF" site:oup.com

Most free "1000 common words PDFs" online are scraped from TV subtitles or old textbooks. The version is different: