For words ending in -a, the plural ending is -ae, e.g., Vertebra becomes Vertebrae
For words ending in -en, the plural ending is -ina, e.g., Lumen becomes Lumina
For words ending in -ex, -ix, -yx, the plural ending is -ices, e.g., Matrix becomes Matrices
For words ending in -is, the plural ending is -es, e.g., Diagnosis becomes Diagnoses
For words ending in -ma, the plural ending is -mata, e.g., Stigma becomes Stigmata
For words ending in -nx, the plural ending is -nges, e.g., Phalanx becomes Phalanges
For words ending in -on, the plural ending is -A, e.g., Ganglion becomes Ganglia
For words ending in -om, the plural ending is -A, e.g., Serum becomes Sera
For words ending in -us, the plural ending is -i, e.g., Thrombus becomes Thrombi