No, the word 'overgrown' is the past participle, past tense of the verb to overgrow. The past participle of the verb also functions as an adjective.
Examples:
The tree has overgrown the fence and needs to be trimmed. (verb)
I split the overgrown plant and planted each half in a pot. (adjective)
Yes. The word tusk is a singular, common, concrete noun; a word for an anatomical organ (an overgrown tooth), a word for a thing.
Overgrown Eden was created in 2002.
On Overgrown Paths was created in 1949.
The ISBN of On Overgrown Paths is 1-892295-10-5.
Yes, the compound noun 'wastelands' is a common noun, the plural form of the singular noun 'wasteland'; a general word for an unused area of land that has become barren or overgrown; a general word for a neglected urban or industrial area; a word for any wastelands of any kind.
There is no standard collective noun specifically for piranhas. The general collective nouns for fish can be used, 'a school of piranhas' or 'a shoal of piranhas'.
undergrown
Was it a rat I saw? * * * * * Sort of. A rat is not an overgrown mouse. They are unrelated species!
It needs to be an overgrown cat, when it's overgrown you can, it goes kitten > cat > overgrown cat so there's 3 stages not 2.
overgrown
Just the overgrown reminance of the pool. Just the overgrown reminance of the pool.
The cast of Overgrown Kingdom - 2013 includes: Mary Lou Davis as Narrator