The plural of may is the same word (still may)
The plural of "theet" is "theets." However, it's worth noting that "theet" is a less common term and may not be widely recognized. If you meant "teeth," the plural is "teeth." Please clarify if you were referring to a different term.
Plural
The plural of Shears is Shears
The plural of degree is degrees
Ceilings is the plural of ceiling
Who may be singular or plural.
The plural of trapezium may be trapeziums or trapezia.
The plural of the surname may be Simmons or Simmonses.
The Latin plural is pupae. The English plural may be pupas.
For the animal (topi), the plural may be topior topis (like antelope).For the type of pith helmet (topi), the plural may be topis or topees.
The plural of flamingo may be either flamingos or flamingoes.
The plural of thorax may be either thoraxes or thoraces.
Species may be singular or plural.
Had may be singular or plural. --- No! We use had if the noun is singular and we use have if the noun is plural! TY!ural.
The plural of yeast may be either yeast or yeasts.
The plural of antenna may be antennae (Latin plural) or antennas.
The word buffalo may be singular or plural. The plural of buffalo, according to several sources, may be buffaloes or remain as buffalo.(The word bison is listed as a plural noun, but is often used as a singular noun.)