Games like Lexicon
Games like Lexicon include Plants vs. Zombies GOTY Edition, Scribblenauts Unlimited, Peggle Deluxe, A Little to the Left, and Is This Seat Taken?. We matched them by the tags players give Lexicon on Steam (Casual, Puzzle, Singleplayer, Education, and Spelling): closest matches first, and among equally close ones the better-known games.

Plants vs. Zombies GOTY Edition
Shared: Casual · Singleplayer · Strategy

Scribblenauts Unlimited
Shared: Casual · Puzzle · Singleplayer

Peggle Deluxe
Shared: Casual · Puzzle · Singleplayer

A Little to the Left
Shared: Puzzle · Casual · Singleplayer

Is This Seat Taken?
Shared: Casual · Puzzle · Singleplayer

Zup! S
Shared: Casual · Puzzle · Singleplayer

Bloons TD 6
Shared: Singleplayer · Casual · Family Friendly

Zup!
Shared: Casual · Puzzle · 2D

Zup! F
Shared: Casual · Puzzle · 2D

Hook
Shared: Casual · Puzzle · Singleplayer

Bejeweled® 3
Shared: Casual · Puzzle · Singleplayer

Peggle™ Nights
Shared: Casual · Puzzle · Singleplayer

Zup! 3
Shared: Casual · Puzzle · 2D

Hexcells
Shared: Casual · Puzzle · Singleplayer

Zup! 8
Shared: Casual · Puzzle · 2D

Zup! 2
Shared: Casual · Puzzle · 2D

Zup! X
Shared: Casual · Puzzle · 2D

Machinarium
Shared: Puzzle · Point & Click · Casual

Gorogoa
Shared: Puzzle · Singleplayer · Casual

Monument Valley
Shared: Puzzle · Casual · Singleplayer

Hidden Folks
Shared: Casual · Puzzle · Point & Click

There Is No Game: Wrong Dimension
Shared: Puzzle · Casual · Point & Click

Storyteller
Shared: Puzzle · Point & Click · Singleplayer

Chinatris
Shared: Casual · Puzzle · Spelling