Games like Watchword
Games like Watchword include Balatro, Slay the Spire, Slay the Spire 2, Backpack Hero, and RACCOIN: Coin Pusher Roguelike. We matched them by the tags players give Watchword on Steam (Roguelike Deckbuilder, Deckbuilding, Roguelike, Replay Value, and Strategy): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Slay the Spire
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Slay the Spire 2
Shared: Roguelike · Deckbuilding · Roguelike Deckbuilder

Backpack Hero
Shared: Roguelike Deckbuilder · Replay Value · Deckbuilding

RACCOIN: Coin Pusher Roguelike
Shared: Deckbuilding · Roguelike · Roguelike Deckbuilder

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

9 Kings
Shared: Strategy · Roguelike · Deckbuilding

Monster Train 2
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Peglin
Shared: Deckbuilding · Roguelike · Strategy

Loop Hero
Shared: Roguelike · Deckbuilding · Choices Matter

Luck be a Landlord
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Wildfrost
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Commander Quest
Shared: Roguelike Deckbuilder · Deckbuilding · Replay Value

Ratropolis
Shared: Deckbuilding · Strategy · 2D

Die in the Dungeon
Shared: Roguelike · Deckbuilding · Roguelike Deckbuilder

Dungeon Clawler
Shared: Roguelike Deckbuilder · Replay Value · Strategy

Black Jacket
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Shogun Showdown
Shared: Replay Value · Roguelike · Roguelike Deckbuilder

FTL: Faster Than Light
Shared: Roguelike · Strategy · Singleplayer

Super Fantasy Kingdom
Shared: Roguelike · Strategy · Deckbuilding

LONESTAR
Shared: Roguelike · Roguelike Deckbuilder · Strategy

Vault of the Void
Shared: Roguelike Deckbuilder · Deckbuilding · Strategy

Monster Train
Shared: Deckbuilding · Roguelike · Roguelite