Similarities between ISO 14001, ISO 9001, ISO 45001 (previous BS OHSAS 18001), and ISO 19011?

ISO 14001, ISO 9001, and ISO 45001 follow the "High-Level Structure" adopted by ISO management standards since 2012. ISO 19011 has nothing to do with those three standards, ISO 19001 is about auditing management systems not about developing management systems.

The following material will provide you more information:

• Article – How to integrate ISO 45001 with ISO 9001 and ISO 14001 - https://advisera.com/45001academy/blog/2018/09/12/how-to-integrate-iso-45001-with-iso-9001-and-iso-14001/
• White paper - How to integrate ISO 9001, ISO 14001 and ISO 45001 - https://info.advisera.com/9001academy/free-download/how-to-integrate-iso-9001-iso-14001-and-iso-45001
• ISO 9001, ISO 14001 and ISO 45001 Integrated Documentation Toolkit - https://advisera.com/45001academy/iso-9001-iso-14001-iso-45001-integrated-documentation-toolkit/

Yes