hidey-hole or hidy-hole/ʹhiedi/ noun

• menstrual cycle
• menstruate
• menstruation
• menstruous
• menstruum
• mensurable
• mensural
• mensuration
• -ment
• mental
• mental age
• mental block
• mental defective
• mental deficiency
• mental handicap
• mentalism
• mentality
• mentation
• menthol
• mention
• mentor
• menu
• meow
• MEP
• meperidine