Alarm PIR sensor located by the front door of a house, inside a porch.

Flashlight Light Beacon Gaslight Searchlight Torch Rustic Outside Apparatus Furnishings Furniture Machinery Material Accessories Accompaniments Accouterments Appliances Appurtenances Articles Attachments Baggage Belongings Contraptions Contrivances Devices Equipage Facilities Fittings Fixtures Gadgets Habiliments Impedimenta Materiel Outfit Paraphernalia Provisions Rig Setup Shebang Stock Store Stuff Tackle Things Tools Trappings Traps Utensils Conservation Insurance Preservation Safeguard Safety Security Shelter Stability Aegis Armament Armor Assurance Barrier Buffer Bulwark Camouflage Certainty Charge Cover Custody Defense Fix Guard Invulnerability Reassurance Refuge Safekeeping Salvation Screen Self-defense Shield Strength Surety Tutelage Umbrella Ward Freedom Asylum Immunity Impregnability Safeness Sanctuary Bond Care Guarantee Surveillance Agreement Bail Collateral Compact Contract Covenant Earnest Pact Pawn Pledge Precaution Promise Retreat Token Warrant Private Calm Family Home Pet Stay-at-home Act Gesture Passage Advance Agitation Ambulation Change Changing Direction Drift Dynamics Flow Fluctuation Flux Gesticulation Inclination Kinetics Locomotion Mobility Motility Move Oscillation Passing Progress Sign Signal Stir Stirring Stream Sway Sweep Swing Tendency Travel Wave Wavering Bar Barricade Block Dam Embankment Facade Fence Side Surface Bank Blockade Curb Enclosure Fortification Hindrance Hurdle Impediment Levee Limitation Palisade Panel Paneling Parapet Partition Rampart Restriction Retainer Roadblock Stockade Stop Building Construction Engineering Planning Architectonics External Outdoor Outer Extraterrestrial Over Peripheral Apartment Box Condo Condominium Dwelling Mansion Residence Shack Abode Castle Cave Co-op Coop Crib Cubbyhole Den Diggings Digs Domicile Dump Edifice Flat Flophouse Habitation Homestead Joint Kennel Layout Lean-to Pad Pigpen Pigsty Rack Residency Roof Roost Shanty Turf Central Familiar Household Local National Native Color Exterior Front Veneer Beard Bluff Disguise Face Fake Frontage Guise Look Mask Phony Pretense Put on Semblance Show Electrical Magnetic AC DC Dynamic Rousing Tense Voltaic Exit Gate Aperture Egress Entry Entryway Gateway Hatch Hatchway Ingress Opening Portal Postern Slammer Bandit Burglar Criminal Crook Mugger Pickpocket Pirate Robber Sniper Swindler Cheat Clip Defalcator Embezzler Hijacker Housebreaker Kleptomaniac Larcener Larcenist Lifter Moonlighter Owl Pilferer Plunderer Prowler Punk Scrounger Shoplifter Spider Stealer Bag Bottle Bundle Container Kit Packet Parcel Amalgamation Assortment Bale Batch Bunch Burden Can Carton Combination Crate Load Lot Luggage Pack Pile Sack Sheaf Stack Suitcase Tin Trunk Unit Arrangement Organization Rule Scheme Structure Classification Complex Conformity Coordination Entity Ideology Integral Orderliness Philosophy Regularity Sum Theory Totality Action Development Evolution Exercise Migration Operation Shift Alteration Deed Displacement Dynamism Flight Journey Journeying Maneuver Movableness Progression Regression Shifting Steps Transit Transplanting Undertaking Velocity Wandering Visual VCRs Camcorders Computers Radios Stereos Televisions Transistors Measure Motion Movement Ploy Procedure Step Modification Proceeding Stratagem Stroke Turn Variation Anxiety Apprehension Consternation Dismay Dread Horror Nervousness Panic Scare Tension Terror Trepidation Unease Uneasiness Distress Fright Strain Stress Departure Emanation Emergence Escape Exiting Exodus Issue Outlet Vent Withdrawal Brightness Beam Brilliance Flame Flash Gleam Lighting Radiance Ray Ominous Admonishing Cautioning Threatening Balcony Deck Portico Stoop Veranda