Nouns

(n)prime, prime quantitya natural number that has exactly two distinct natural number divisors: 1 and itself
(n)flower, prime, peak, heyday, bloom, blossom, efflorescence, flushthe period of greatest prosperity or productivity
(n)primethe second canonical hour; about 6 a.m.
(n)prime, prime of lifethe time of maturity when power and vigor are greatest

Verbs

(v)primeinsert a primer into (a gun, mine, or charge) preparatory to detonation or firing“prime a cannon”, “prime a mine”
(v)prime, ground, undercoatcover with a primer; apply a primer to
(v)primefill with priming liquid“prime a car engine”

Adjectives

(s)premier, primefirst in rank or degree“an architect of premier rank”, “the prime minister”
(s)primeused of the first or originating agent“prime mover”
(s)choice, prime, prize, quality, selectof superior grade“choice wines”, “prime beef”, “prize carnations”, “quality paper”, “select peaches”
(a)primeof or relating to or being an integer that cannot be factored into other integers“prime number”
(s)prime, meridianbeing at the best stage of development“our manhood's prime vigor” (Robert Browning)