Or search: brush, applier, applicator
2 Syllables: SU
aimless, blameless, faintest, faintness, lameness, nameless, painless, plaintiff, sameness, shameless, stainless, strangeness, waitress
3 Syllables: USU
cutaneous, extraneous, spontaneous
4 Syllables: UUSU
instantaneous, miscellaneous, simultaneous, subcutaneous, subterraneous
5 Syllables: UUUSU
contemporaneous, extemporaneous

Found 23 words across 4 groupings.