Would any wordsmiths be able to help?

A rhinohippodraffolon.

I love the idea of a Zebrat!

Platypussy - a duckbilled pussycat?

Footling and faffing, and a childhood word to describe a long pole that is used to open windows, bring down items that are out of reach : Piffle Snonker.

If you don't have enough after all the magnificent suggestions here, you might google "synonyms and antonyms" for some more help.

Fossiking

Fumbled
Folded

Tortog (tortoise/dog)

You can Google for adjectives or verbs beginning with F - or any letter of the alphabet. There are lists available!

Here's a couple of Cumbrian dialect words

'Fratch' it means to bicker, squabble, when kids fight we say they are Fratching.

'Frae' - where you Frae? Where are you from.

'Fyass' - yes it means face

'Fettle' - often heard 'How's 'T Fettle' meaning how are you.

'Fistle' - to fidget

On that note Tarra Marra!

Thank you everyone for contributing to my story. It has now gone to the GCs. The whole family is helping them with their literacy by taking it in turns to start a story and they have to finish it.

They are all so sad about missing school. No amount of home schooling can make up the friendship and group learning at school.

Fragile? Friable?

Use a Thesaurus?

Rabhog
Foxbadge
Dolphwhale
Turtledile
Cowgo
Mousephant

A Zebrat
A Hedgiepig
A Lionaroarus

Feartiforous
Frightingalated
Fearfarting

Hipholephant
Giraffarrilo
Crocodidle

this is fun.

A crocoraffe
A goribra

A Chimpanpoodle

Fantabulous
Fandabbidozy

These are brilliant thank you. How about this, the story contains several hybrid animals, for example a Cowganroo and then Octomouse. So judging by your help so far I can pass this little task over to you. I will give you all credits and share the royalties

Festering

Flustered
Frit
Flamboozled

Fandango
Flibbertigibbet
Fol-de-rol
Flimflam
Footering (Scottish)

I do hope that this story has a happy ending!

ie that the conclusion is
fantastic, fabulous, felicitous, fortuitous, with a far-reaching and famed fulfilment.

Foetid
Floundering
Fabled

Fractious
Fussy
Flap doodle
Ferocious
Flapping

Fandangled