What’s the Plural of Crisis?
Crisis, which comes from Greek, is crises as a plural noun form. Crises is the only correct plural of crisis.
Did you know that we all speak a little Greek? Many commonly used words in English are originally Greek. Most Greek nouns in english that still use their original suffixes to denote their singular and plural noun forms; (e.g., “analysis” plural is “analyses“; crisis plural is crises.). It helps to learn these irregular noun forms because they differ from most English nouns.
Crisis, which comes from Greek, is crises as a plural noun form. Crises is the only correct plural of crisis.
Oasis, plural, is oases. Like other Greek nouns that have conserved their form, oasis turns to oases in its plural noun form.
Analysis is singular; analyses is plural. Analysis comes from Greek, and uses -ses to show a pl. n. form.
Nemesis plural is nemeses, like other Greek words, it ends in -ses as a plural noun.
Thesis, which means “proposition”, and derives from Greek, is a singular noun. The plural of thesis is theses.
The short answer is that both hippopotamuses and hippopotami are correct plurals for this barrel-bodied and rotund mammal: the hippopotamus.
Axis plural is axes (not to be mistaken for the woodsman’s tool, albeit spelled the same.)
The plural of hypothesis is hypotheses. Hypothesis is the singular noun form.