.com domain names great volumes keywords search

I'm developing some sites. I need to choose their names and their domain names. I'd like to find out some domain names about keywords with great search volumes to boost SEO activity later; this is more important than people appeal. Obviously if they were nice, it would be better.
I need help to research these domain names:
1) .com domain for a guesthouse in Italy; site is in English because the target are ONLY foreign tourists. this is the most urgent and important!

... then less urgent
2) .com domain for a site similar to 99designs.com but only about photo requests.
3) .com domain for Photo gallery site about an Italian region. Users share their photos
4) .com domain for directory for local farmers shops at 0 Km

...and very very less urgent
5) .com domain for a site with photos and info about all the catholic churches in the world
6) .com domain for a Small Business Sponsorship marketplace
7) .com domain for a website offering audio transcription speech to text


Please take care I'm not asking here for doing SEO but to choose domain names. Perhaps I would give one or more domains to make SEO: but that is another matter.

please ask if anything is not clear