-oid, -oidal, -oidism, -odic

(Greek: a suffix; like, resembling, similar to, form)

acanthoid (adjective), more acanthoid, most acanthoid
Resembling a spine, spine shaped; spinous: Thomas observed the porcupine with its acanthoid and spiny covering intended to protect it from prey.
acanthozooid (s) (noun), acanthozooids (pl)
An animal with spines or spine-like growths: An acanthozooid is a member of the sessile aquatic coelomates and emits little tube-shaped structures extending as needle-like projections above the surface of the colony.
acaroid (adjective), more acaroid, most acaroid
Resembling a mite, or mite-like: This term pertains to an acaroid form of an Acarus or a mite.
Similar to or like acid.
A bodily condition resembling acromegaly but not due to pituitary disorder.
Resembling the beginnings of lines of poetry.
Rayed; star-shaped or stellate.
Resembling a gland; when used in the plural, adenoids, they refer to lymphoid tissue that normally exists in the nasopharynx of children and is known in medicine as the pharyngeal tonsil.
Resemblance to fat; also, lipoid.
Belonging to, or having the characteristics of, the division Aeluroidea of Carnivora, comprising the feline and allied families; as an animal of this division.
albinoid, albinoidism, albinoism
Resembling an albino; having the appearance of an albino.
Like or resembling albumen; of the same character as albumen.
Resembling flour.
Resembling, or of the nature of seaweed.

Inter-related cross references, directly or indirectly, involving word units dealing with "form, shape, appearance": eido-; figur-; form-; icono-; ideo-; imag-; morpho-; typo-.