10-Letter Words Containing: IS

• A jack (in any of the senses referring to types of fish).

• quixotic (romantic and impractical) behavior

• in a clannish manner

• make unfit or unsuitable

• declare unfit

• the master gland of the endocrine system; located at the base of the brain

• reproduction involving the union or fusion of a male and a female gamete

• union of sperm and egg in sexual reproduction

• Fop, dandy.

• come out better in a competition, race, or conflict