intercalary year (noun) leap year: year with February 29
Sinonime: agreeable, composed,
consistent,
constant, easy-going,
even, even-tempered, imperturbable, level-headed,
methodical,
orderly,
placid,
regular,
serene,
smooth, stabile,
stable,
systematic,
temperate,
tranquil,
unchanging, unexcitable, unflappable, unfluctuating,
uniform, unruffled, unvarying
Antonime: changeable, excitable, fluctuating,
irregular, spasmodic,
vacillating,
variable,
varying,
wavering