Spelling
89
- focus, focuses
- folium, folia
- formula, formulas
- forum, forums
- fungus, fungi
- genius, geniuses
- genus, genera
- gladiolus (singular and plural)
- helix, helices
- hypothesis, hypotheses
- index, indexes (indices, scientific)
- insigne, insignia
- italic (singular and plural)
- Kansas Citys
- lacuna, lacunae
- larva, larvae
- larynx, larynxes
- lens, lenses
- lira, lire
- locus, loci
- madam, mesdames
- Marys
- matrix, matrices
- maximum, maximums
- medium, mediums or media
- memorandum, memorandums
- minimum, minimums
- minutia, minutiae
- monsieur, messieurs
- nucleus, nuclei
- oasis, oases
- octopus, octopuses
- opus, opera
- parenthesis, parentheses
- phenomenon, phenomena
- phylum, phyla
- plateau, plateaus
- podium, podiums
- proces-verbal, proces-verbaux
- radius, radii
- radix, radixes
- referendum, referendums
- sanatorium, sanatoriums
- sanitarium, sanitariums
- septum, septa
- sequela, sequelae
- seraph, seraphs
- seta, setae
- ski, skis
- stadium, stadiums
- stimulus, stimuli
- stratum, strata
- stylus, styluses
- syllabus, syllabuses
- symposium, symposia
- synopsis, synopses
- tableau, tableaus
- taxi, taxis
- terminus, termini
- testatrix, testatrices
- thesaurus, thesauri
- thesis, theses
- thorax, thoraxes
- vertebra, vertebras (vertebrae, zoology)
- virtuoso, virtuosos
- vortex, vortexes
Endings "ible" and "able"
5.11.
The following words end in ible; other words in this class end in able.
- abhorrible
- accendible
- accessible
- addible
- adducible
- admissible
- appetible
- apprehensible
- audible
- avertible
- bipartible
- circumscriptible
- coctible
- coercible
- cognoscible
- cohesible
- collapsible
- collectible(s)
- combustible
- comestible
- commonsensible
- compactible
- compatible
- competible
