"pyramid" is a 7 letter common singular noun that clearly begins with "p" a noun is a person, place, thing, or idea- a "pyramid" is a thing
Pennsylvania
That's perfect.
pashima=shawl
scallop
Pelican
Prison
Pointy is a 7 letter word that means sharp
popcorn
harelip, hilltop
Cryptic
A praying mantis starts with the letter p, and a pill bug does too
Potatoes are veggies. Potato starts with p. :)