When I type "Spartan Biotech" into Google's Adwords Keyword Tool,
I get only one keyword suggestion: Spartan Bioscience.
That's not a really good sign.
:-)
bleak, barren, grim, primitive, stark.
But some of those that embody what you like about the word are
not that bad: bare-bones, clean, plain, rustic, simple, spare, unadorned,
unembellished, vanilla.
On the other connotation for Spartan we have: adventuresome,
audacious, cool, daredevil, daring, dauntless, gallant, gritty, gutsy,
hardy, heroic, indomitable, intrepid, resolute, stalwart, valiant.
Try picking three words instead of two -- that eliminates a lot of
domain name squatters and makes the domain easier to get.
Some two word names might also be available:
A thesaurus will gets you lots of synonyms to group together.