Trafficky

Adj.
traf-ick-key

Somewhere where there is a lot of traffic.

"After the game, the roads will be all trafficky and it will take a while to go anywhere."

Sustenantial

Adj.
sus-ten-ent-shul

Combination of sustenance and substantial.

"Shouldn't you be eating something more sustenantial than just mashed potatoes?"

Conundrumous

Adj.
co-nun-drum-us

An interesting situation not easily explained by reason.

"The fact that he contacted me, not his sister, is very conundrumous."