General:
* Clean
* Sanitary
* Hygienic
* Well-maintained
* Fresh
* Healthy
* Proper
Relating to the body:
* Neat
* Tidy
* Groomed
* Presentable
* Odor-free
* Clean-shaven (if applicable)
* Well-kept
Relating to environments:
* Sterile
* Disinfected
* Sanitized
* Germ-free
* Spotless
* Orderly
* Well-ventilated
Actions that result in good hygiene:
* Washed
* Brushed
* Flossed
* Bathing
* Showered
* Scrubbed
* Cleaned
* Sanitized
* Disinfected
Qualities a person with good hygiene exhibits:
* Conscientious
* Mindful
* Careful
* Diligent
* Respectful (of self and others)
The best word to use will depend on the specific context. For example, you might say a person has "well-kept" nails, but a hospital room needs to be "sterile."