Common Words:
* Android: A robot with a human-like appearance
* Asteroid: A small rocky body orbiting the sun
* Crystalloid: A substance that forms crystals
* Ellipsoid: A three-dimensional oval shape
* Fetaloid: Resembling a fetus
* Fungoid: Resembling a fungus
* Hyaloid: Resembling glass or hyaline cartilage
* Lactoid: Resembling milk
* Narcotic: A drug that induces sleep or stupor
* Ovoid: Egg-shaped
* Petroid: Resembling stone
* Plantoid: Resembling a plant
* Psychoid: Relating to the mind or soul
* Spheroid: Nearly spherical
* Steroid: A class of organic compounds including hormones
* Tuberculoid: Resembling a tubercle
* Typhoid: A bacterial disease that causes fever and inflammation
Less Common Words:
* Alveoloid: Resembling an alveolus (small air sac in the lungs)
* Anthropomorphid: Resembling a human in form
* Bacteroid: Resembling a bacterium
* Blastoid: Resembling a blastula (early stage of embryonic development)
* Calcoid: Resembling lime
* Carcinoid: Resembling cancer
* Cephaloid: Resembling the head
* Chondroid: Resembling cartilage
* Cilioid: Having cilia (hair-like projections)
* Cystoid: Resembling a cyst
* Dendroid: Resembling a tree
* Discoid: Disc-shaped
* Echinoid: Resembling a sea urchin
* Fissurioid: Resembling a fissure
* Globularoid: Resembling a globule
* Gymnoid: Resembling a gymnosperm (a plant with naked seeds)
* Hemoid: Resembling blood
* Hepatoid: Resembling the liver
* Histoid: Resembling tissue
* Lamelloid: Resembling a lamella (thin plate)
* Lenticuloid: Resembling a lens
* Lepidoid: Resembling scales
* Lichenoid: Resembling lichen
* Mammoid: Resembling a mammal
* Mycoid: Resembling a fungus
* Nephroid: Resembling a kidney
* Neuroid: Resembling a nerve
* Osteoid: Resembling bone
* Pachyoid: Resembling a pachyderm (thick-skinned animal)
* Parasitic: Resembling a parasite
* Phylloid: Resembling a leaf
* Pulmonoid: Resembling a lung
* Radioid: Resembling a ray
* Renoid: Resembling a kidney
* Rhinoid: Resembling the nose
* Rhizoid: Resembling a root
* Sclerotic: Resembling hardened tissue
* Sporoid: Resembling a spore
* Stomatoid: Resembling a mouth
* Trophoid: Resembling a trophoblast (outer layer of a blastocyst)
* Uroid: Resembling a tail
This is not an exhaustive list, and many other words ending in "-oid" exist. These examples illustrate the variety of uses for the suffix, often indicating a resemblance or similarity to a particular object, structure, or organism.