- machine accessories (work equipment)
- machine element / component (machine)
- Machine maintenance (accessories)
- Machine Maintenance / Machine Repair
- machine oil / motor oil
- machine tool
- Machining (manufacturing)
- Made-to-order production (type of production)
- mafia
- magazine
- magic (artistry)
- magnetic memory / storage
- mail art
- mail order business
- mainframe computer / host system
- mainstream
- make-up accessories
- make-up artistry
- male gender / masculinity
- mammal
- man
- management / corporate governance
- manager / executive
- Mandolin Slicer
- manhunt / search
- manicure / pedicure
- Manicure / Pedicure (care product)
- Manicure / Pedicure (utensils / accessories)
- manifest / declaration
- Manner of death
- Mannerism
- manual (book)
- manual production (production type)
- manufacturing process
- manuscript (historical document)
- manuscript / typescript
- Maoism
- map (cartography)
- marijuana (drugs)
- marionette / puppet
- mark / identifier / sign
- market / bazar
- market / competition (economy)
- market economy
- market research
- Marketing
- Marketing Strategy
- martial arts
- Marxism
- mascot
- mask (face covering)
- masonry (building technique)
- Masonry supplies (equipment / tool)
- massage
- master's degree / master's thesis
- material
- material (product feature)
- Material (Production)
- Material property
- Material-handling vehicle
- Materials science
- Mathematical symbol
- mathematics
- Mattress
- May Day
- maze (ornament)
- meadow
- meal
- means of conveyance / transport system (misc.)
- means of payment
- Means of Production
- means of production (appliance / machine)
- Means of Transport (Misc.)
- Means of Transportation
- Measuring Cup
- measuring instrument (misc.)
- Measuring Technology /Measuring Procedure
- meat (food)
- Meat Grinder (mechanical)
- meat product
- Meat Tenderizer
- Mechanical Engineering
- mechanics
- medal
- medal / decoration
- medallion (ornament)
- Media
- media art / new media art
- media award / prize
- media center / media rental
- Media consumption
- media criticism
- media design
- media documentation / press documentation
- media information (PR)
- media management
- media monitoring
- media studies
- media theory
- medical emergency
- medical science (specialty)
- medical service / rescue service
- medical technology
- Medicine
- medicine (equipment / instrument)
- meditation / contemplation
- meeting / session (politics)
- men's fashion / men's wear
- mental disorder
- mental handicap
- mental illness / insanity
- menu (food)
- mesh (packaging)
- mesh bag (packaging)
- mess kit / mess tin (military)
- message (misc.)
- Metabolism
- metal (building material)
- metal (material)
- Metal (raw material)
- metal object (craft work)
- metal processing (processing technology)
- metal working (equipment / tools)
- Metalcut (printing technique)
- Metalsmithing studio (branch of handicrafts)
- metamorphosis (nature)
- metaphysics
- meteorology
- Microbiology
- microcar
- microsomia
- Microwave
- middle class
- Midriff jewelry
- migration
- militarism
- Military
- military (armed forces)
- military (profession / rank)
- Military building
- Military conscription
- military draft
- military equipment
- military event
- military facility / base
- Military law
- military maneuver
- military organization / formation
- military parade
- military service
- Military unit / Troop
- military utensils
- Military vehicle
- milk
- milk beverage / flavored milk drink
- Milk Jug
- mine (explosive weapon)
- mineral (natural resource)
- Minimal art
- minimalism (art)
- mining
- minority
- Minutes / Chronicle (document)
- Mirror
- mirror (material)
- mirror image (subject / genre)
- missile weapon
- mixing console / mixer (audio)
- Mobile (Home Accessory)
- mobile (kinetic art)
- mobile communications
- mobile computing
- Mobile design
- mobility
- mobilization
- Mocha Pot
- model (architecture)
- model (product development)
- modeling / modeling technique
- modeling / mold making (manufacture)
- modiste / hatter (profession)
- Mola / needlework (object)
- Mold fungus
- Molecular biology
- monarchy
- money
- monopoly
- monotype (printing technology)
- month
- monument
- moon
- moped
- mosaic (craft work)
- moss
- Moth Repellent
- motion / movement (subject / genre)
- motor scooter
- motor sports / motorsport
- motorbike
- motorcycling
- mould / pattern (working equipment)
- mountain / mountain range
- mountain railway company
- Mounting (Furniture)
- Mounting element (construction)
- mouse (data input device)
- mouse trap
- Move / Moving (Living)
- movement (body function)
- movie setting / set
- MP3 player
- multi-discipline event (sport)
- multi-parted (product feature)
- multifunctionality (product feature)
- Multilingualism
- multimedia
- multiple (fine arts)
- multiple sclerosis / MS
- mummy
- murder mystery
- museology
- museum / collection
- museum organization
- mushroom
- mushroom (food) / edible mushroom
- Music
- music (accessories)
- music (contest)
- music (event)
- music (genre)
- music (organization)
- music (profession) / musician
- music (science)
- Music / Literature
- Music automaton (mechanical)
- music award / prize
- music business / industry
- music club / party organizer
- music contest
- music education
- music film / video
- music practice
- Music Stand / Music Rest
- music theater
- music theory
- Music therapy
- musical box
- musical form (music theory)
- musical history
- musical instrument
- musical theater
- musical work
- musicology
- mysticism
- myth
- mythical creature
- mythology
- mythology (character / creature)
- Mythology (place)