Nouns

(n)brood hen, broody, broody hen, setting hen, sittera domestic hen ready to brood

Adjectives

(s)broodyphysiologically ready to incubate eggs“a broody hen”
(s)brooding, broody, contemplative, meditative, musing, pensive, pondering, reflective, ruminativedeeply or seriously thoughtful“Byron lives on not only in his poetry, but also in his creation of the ‘Byronic hero’ - the persona of a brooding melancholy young man”