Synonyms for Hard shell

Synonyms starting with letter R

• rude

  nasty
• ruthless

  nasty
• relentless

  serious, nasty
• rigid

  serious
• rhinoceros hide

  ability to withstand
• rash

  stubborn
• reckless

  stubborn
• refractory

  stubborn
• rough

  serious
• rigorous

  serious
• rough go
• rugged
• receiving
• retaliatory
• runty
• ravening