Chapter Insensibility to Insulator of I by Soule's Synonymes

2. Advice, counsel, precept.
3. Direction, order, command, mandate.

Instructor, n. Teacher, tutor, preceptor, master, school-master, educator.

Instrument, n.

1. Tool, implement, utensil.
2. Medium, agent, means.
3. Writing, document, charter, deed, indenture.
4. Musical instrument.

Instrumental, a.

1. Conducive, subservient, serviceable, helping, helpful, assisting, auxiliary, ancillary, subsidiary, ministerial.
2. Of (musical) instruments.

Instrumentality, n. Agency, mediation, intervention.

Insubordinate, a. Disobedient, unruly, mutinous, riotous, seditious, disorderly, turbulent, ungovernable, refractory.

Insubordination, n.

1. Disobedience, revolt, insurrection, mutiny, riotousness, sedition.
2. Indiscipline, lax discipline, laxity.

Insufferable, a.

1. Intolerable, insupportable, unbearable, unendurable, that cannot be borne or endured.
2. Outrageous, disgusting, detestable, abominable, execrable.

Insufficiency, n. Inadequateness, inadequacy, incompetence, deficiency, lack, defectiveness, dearth.

Insufficient, a.

1. Inadequate, incompetent, deficient.