* Midwifery itself is an abstract noun, referring to the practice and profession.
* Midwife is a concrete noun referring to the person who practices midwifery.
* Birth or labor could be considered concrete nouns related to the process, but they don't fully encompass the role of the midwife.
More specific concrete nouns depending on the context:
* Tools: Stethoscope, Doppler, birthing ball, etc.
* Actions: Exam, massage, support, advocacy.
* Outcomes: Baby, placenta, birth experience.
Ultimately, the best "concrete noun" depends on the specific aspect of midwifery you want to highlight.