Nature Names:

Acacia
Echinacea
Typha
Sodium
Dahlia
Lotus
Alpaca
Snowflake
Plum
Nectar
Elderberry
Snapdragon
Durian
Mangosteen
Hedera
Tarragon
Clove
Oyster
Morel

Other Pretty Words:

Velvet
Grace
Serendipity
Moondrop
Fortune

Good names for cats:

Skull
Tater Tot
Missy
Rusty
Cowboy
Arya
Emerald
Sweetie
Muffin
Porridge

Some of these could easily be argued to fit multiple categories, but I sorted them as best I could.

Nature names:
Bee
Cherry
Cricket
Fern
Iris
Linden
Marsh
Olive
Peanut
Pearl
River
Rowan
Sage
Snowdrop
Taiga

Fantasy names:
Brownie
Calliope
Dracula
Leshy
Pixie

Pretty words:
Echo
Melody
Ravine
Shimmer

Good cat names:
Caramel
Chirp
Joy
Kazoo
Mocha
Marmalade
Misty
Nibbles
Squiggle
Sandy
Skipper
Snickersnack

nature:
Buzzy
Rice
Maize
Raven
Rabbit
Panda
Otter
Seal
Ermine
Sunrise
Moonlight
Starshine
Crystal
Salt
Honey
Sierra
Seashell
Pearl
Bones

fantasy:
Abracadabra
Voila
Houdini
Gandalf
Spock
Anakin


cool and/or cute words:
Buddy
Pal
Wig
Wild
Orbit
Azimuth
Freckle
Giggle
Wiggle
Snap
Balloon
Bell
Bushel
Vizier
Angel
Seraphim
Soda
Candle
Wonder
Terrain

real life cat names:
Sasha
Kitty
Emma
Tina
Sara
Charlotte
Arabel
Momo
Yolo
Eddie
Ricky
Nicky
Mickey
Danny
Bobby
Tommy

I have some Australian fawna and flora to suggest as names: Koala, Kangaroo, Bandicoot, Wombat, Bilby, Gum(as in gum tree), Plover, Magpie and Wattle

- Cornelius
- Zinnia
- Springcake
- Nom
- Square
- Corvid
- Constellation
- Vex
- Catmila (get it- Cat + camila)
- Leo
- Pawter (peter + cat)

You could add spacy names! Such as the planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto (plus maybe some moons like Callisto or Io))
Or things like Andromeda (from the galaxy), Nova, Nebula, Comet, Quasar, or even just Galaxy could work too.

Nature Names:

Allium
Hydrangea
Bud
Lemur
Hyena
Sloth
Meerkat
Alpine
Arctic
Tropic


Fantasy Names:

Draco
Kelpie
Selkie
Siren
Nessie
Titan

Fun Words:

Murmur
Pretzel
Humble
Mumble
Fumble
Jumper
Bundle

Normal Name:

Phillip
Pip
Hunter
Cupcake
Desire

1. Nature Names/Words
Xate
Capybara
Scales
2. Fantasy Names
Wednesday
3. Other Pretty Words
Rumble
Blob
Kepler
Eartha
Potassium
Carbon
4. Good Names for IRL Cats
Sock
Apollo

Random words for names:
-Backflip
-Leg
-Breakfast
-Shelf
-Map
-Librarian

Some nature names:

Egret
Heron
Rhododendron
Oleander
Coyote
Carnation
Cormorant
Jay
Rook
Crow
Raven
Cardinal
Goldfinch
Wren

I know a lot of pretty bird names haha