solid; strong; sturdy; durable; stout
steady; sound; stable; safe (e.g. business); reliable; trustworthy
nucleus; backbone; medium-level; mid-level; main body (of troops); crack troops
adhering to (a view, policy, etc.); sticking to; holding fast to; steadfastly maintaining
firm and unyielding; rigid
firm (market); bullish; strong (sales, economy, etc.); steady; sound
pachycephalosaur (any dinosaur of infraorder Pachycephalosauria)