Signed up
Sign and signed up are semantically related. in contribute topic. In some cases you can use "Sign" instead a verb "Signed up".
Cite this Source
Sign and Signed up. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/signed_up/sign
Signed up & Sign. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/signed_up/sign>.
Sign or Signed up. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/signed_up/sign.
Google Ngram Viewer shows how "signed up" and "sign" have occurred on timeline