vulcanism/ʹvulkəniz(ə)m/ noun

• recurrent
• recurring decimal
• recursion
• recursive
• recurve
• recusant
• recyclate
• recycle
• red
• redact
• red admiral
• red algae
• redback
• red biddy
• red blood cell
• red-blooded
• redbreast
• redbrick
• redbush
• redcap
• red card
• red-card
• red carpet
• red cedar
• red cell