(i) exorbitantly (adv) – excessively, smaller words – orbit, bit, ant.

related words – exorbitant.

(ii) precaution (n) – to take care beforehand. smaller words – caution, cat, rat, pet, ear, action, reaction.

related word – caution

(iii) unauthorised (adj) – having no authority. smaller word – author, ant, rise, his, this, north, said related words – authorise, authorised.

(iv) repeatedly (adv) – done several times; again and again.

smaller words – repeat, pet, eat, ate, pat, rat, tape, trade

related words – repeat, repeated.

(v) enthusiastically (adv) – done in an excited and motivated manner.

smaller words – enthusiastic, thus, ally, silly, thin, ten related words – enthusiast, enthusiastic, enthusiastical.

Collective nouns also have singular and plural forms.

Examples:

class – classes, herd – herds, team – teams.

Some more examples

• arrm armies council – councils
• school – schools group – groups
• society – societies cabinet – cabinets
• department – departments, etc

Collective Nouns (examples)

1. an army ol ants 

2. a flight of birds 

3. a school of hsh 

4. a shoal ol hsh 

5. a choir ot singers 

6. a band of musicians 

7. a crew of sailors 

8. a troupe of artists/dancers 

9. an audience of listeners 

10. a litter of puppies/kittens 

11. a galaxy of stars 

12. a group of islands 

13. a forest of trees 

14. an album of stamps/autographs/photographs