PUISNE
Puis"ne, n.

Defn: One who is younger, or of inferior rank; a junior; esp., a judge of inferior rank. It were not a work for puisnes and novices. Bp. Hall.

PUISNY
Puis"ny, a.

Defn: Puisne; younger; inferior; petty; unskilled. [R.]
A puisny tilter, that spurs his horse but on one side. Shak.

PUISSANCE
Pu"is*sance, n. Etym: [F., fr.puissant. See Puissant, and cf.
Potency, Potance, Potence.]

Defn: Power; strength; might; force; potency. " Youths of puissance."
Tennyson.
The power and puissance of the king. Shak.

Note: In Spenser, Shakespeare, and Milton, puissance and puissant are usually dissyllables.

PUISSANT Pu"is*sant, a. Etym: [F., originally, a p. pr. formed fr. L. posse to be able: cf. L. potens powerful. See Potent.]

Defn: Powerful; strong; mighty; forcible; as, a puissant prince or
empire. " Puissant deeds." Milton.
Of puissant nations which the world possessed. Spenser.
And worldlings in it are less merciful, And more puissant. Mrs.
Browning.

PUISSANTLY
Pu"is*sant*ly, adv.