1. Written or printed between lines.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• unterlineal,
• jnterlineal,
• knterlineal,
• onterlineal,
• 9nterlineal,
• 8nterlineal,
• ibterlineal,
• imterlineal,
• ijterlineal,
• ihterlineal,
• inrerlineal,
• interlienal,
• interlinual,
• interlinear,
• interlinial,
• interlinieal,
• interlinell,
• interlieneal,
• interlieneel,
• interlinealll

• internee,
• intermingle,
• interior,
• interweave,
• intervene,
• interesting,
• interstitial,
• internet,
• interlobular,
• internationale,
• inter alia,
• international,
• interracial,
• intermingled,
• interlaced,
• Interpol,
• interlace,
• interlocking,
• internist,
• interlope,
• interiorise,
• internalise,
• Interlaken,
• interpellate,
• intermural,
• intertribal,
• in theory,
• interlingua,
• interplanetary,
• interleukin,
• interiorize,
• intercostal,
• interpersonal,
• intertwined,
• interestingly,
• interference,
• intercede,
• interbrain,
• interminable,
• interphone,
• Interleaf,
• internecine,
• interlock,
• intertidal,
• interfacial,
• interval,
• interlude,
• interlinear,
• internal,
• interstice,
• interlocutor,
• interconnect,
• interlinking,
• interloper,
• internment,
• interpolate,
• interface,
• interlink,
• interlacing,
• intercalate,
• interrelate,
• interlard,
• interfering,
• interfere,
• intertwine,
• interferon,
• intervertebral,
• interment,
• interlanguage,
• intersexual,
• internally,
• Internode,
• interleave,
• intermarriage,
• internal ear,
• internalize,
• interlayer,
• interpose,
• interminably,
• interlocutory.

The adjective form of the word "interlineal" is "interlinear".

The plural form of the word "interlineal" is "interlineals".

The singular form of the word "interlineal" is "interlineal". It remains the same in both the singular and plural forms.