Frugal - (adjective) using only as much money or food as is necessary. Example: We cannot live with frugal engineering alone.
Serendipity - (noun) finding something valuable or delightful by chance.
Petrichor - (noun) The pleasant, earthy smell that follows a fresh rain.
Defenestration - (noun) The act of throwing someone out of a window.
Sonder - (noun) The realization that each passerby has a life as vivid and complex as your own.