Homonyms are so interesting.
When identifying Apiaceae I found out that the Oenanthe I had been suggesting was the bird genus and not the plant genus. (I found out hours later)
What also happens frequently is that people around the world ID their cicada observations as Cicada (a genus restricted to the Mediterranean) instead of Cicadidae (the cicada family).
There’s a moth called “The Mallow” that gets lots of plants mistakenly ID’d as it, and one called “The Crescent” that gets Crescent butterflies placed under it. Also “Pero” is a common moth genus that gets misidentified as a dog sometimes because “Domestic Dog (Pero)” is the first result when you type “Pero” into the Identify bar. I’ve also selected Hylesia lineata instead of Hyles lineata a few times.
Plus of course there’s the laundry list of genera used for both a plant and an animal- Amorpha, Pieris, etc.
That I had to look up. “Perro” is Spanish for dog, while “pero” means “but”, but in Maori, one of the words for dog is “pero”. The English Wiktionary doesn’t have the Maori word.
Someone types in Amantia (A genus of laternflies, the group of my interest, that is why I spotted it first) in place of Amantia on their observation, which belongs to another Phylum! See the observation here - https://www.inaturalist.org/observations/128537601
I’m constantly typing in “Tara” looking for “Taraxacum” (dandelion genus), accidentally hitting Enter, and ID’ing a dandelion as a white-fronted tern. No idea why it does that.
Tara is both a pea, and a spider ! And Maori in New Zealand for the bird.
But taraX will work for you
Euclea (moth) vs Euclea (plant) has caught me a few times by mistake
I have seen a few observations where the genus Myrmecia (bull ants) has been misidentified as genus Myrmecia (green algae). Even more confusingly, both have a species named M. pyriformis (though I haven’t seen a mis-ID where the two species were confused).
https://www.inaturalist.org/observations/317943687
Erianthus could eat Erianthus, if the Pacific Ocean weren’t in the way.
I’m not sure what’s happening here but this may be an example?.
https://www.inaturalist.org/observations/317744521
This bromeliad Neoregelia cruenta has no common names.
Maybe he typed “neo cru”.
The genus Rata doesn’t even have any species entered, let alone observations!
Ah, I found it!! It was a Common Pampas Grass (Cortaderia selloana) misidentified as the fish genus Pampus (memory slipped a little there 
)
Petition to describe a new Ins species (if it exists) as Ins ecta lol
https://www.inaturalist.org/observations/310983714
interesting misclick, also weird that someone else agreed with it, calling for more ids to get this fixed
If we don’t know that there is a Fill in The Blank with a similar name, we see what we expect to, the taxon we know, the one we poked at autocomplete.
The beetle misidentified as a mantis shrimp has been misidentified again as Ogdoconta (which sounds a lot like Greek for eighty, ογδοήκοντα). I didn’t recognize it and assumed it’s a beetle, until someone else commented on it. It’s actually a moth. I don’t know how that happened.
This is more of a homonym problem than a sounds-alike problem, but I just learned that Pilophorus clavatus is both a lichen and a true bug. I’m used to homonyms at the genus level, but this surprised me.
